a15a46c617772795ae2bc8b08c49e16cf8b4b33f
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Commits
| Author | SHA1 | Message | Date | |
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  SenrokaiandClaude Opus 5.5
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a15a46c617 |
Correct what the ETL, the code and the textures README said of their own sources and figures
- The IAU day check said it compared W with the period Horizons states. That holds for the eight
planets and Phoebe only. Pluto's and Ceres's periods are the IAU's own rate restated (8.5e-12 and
3.3e-10: Horizons' Pluto period is 360 over its W, and the SBDB notes it derived Ceres's from the
report's 952.1532 degrees a day), and the 22 locked moons' is their orbit's, from JPL's table, not
from their Horizons pages ("Synchronous" on eighteen, nothing on Titan's or Proteus's), and now
their W's own rate. The comment, the log line and the error message say which is which; the log
shows 0.0e+0 for the twenty locked moons turned at their orbit's rate, 1.1e-8 and 3.1e-7 for the
Moon and Phobos. BodyRecord.rotationPeriodHours says that where a source states no period, or
one a later measurement overturns, it is the one the ETL spec carries (Nereid's, Eris's), where
the previous commit had Eris among the bodies whose source states none.
- Phoebe's spec justified its period by a note in the satellite table, which is about another
source (Jacobson 2000, Jupiter's outer moons) and says the table carries corrected values. The
row's n is right as the table defines it, the rate of the mean longitude: n less twice the node's
rate is 0.6541855 degrees a day, against 360 / 550.30391 = 0.6541840. What made Phoebe drift is
that the propagator reads a retrograde moon's n as its sidereal rate, as Triton's row gives it.
The comment now says so; the period, 550.30391 days, is kept.
- body-orientation.ts and its spec said the IAU's W for Earth, "taken at UT", left its face 2.3 and
4.5 degrees off Horizons at AD 1000 and AD 1. The old code took it at UT + 69.184 s; those are
that figure's, and at UT itself they are 2.0 and 4.2, as three reviewers measured through the
code (4.25, 4.25 and 4.28 at AD 1).
- The renderer said the 28 maps entering the Sun's system are about 20 megapixels of JPEG. Read
from their frame headers: 37.75, nine at 2048 by 1024 with the Sun's, Jupiter's at 3840 by 1920
and eighteen smaller.
- The textures README gave Titan 0.02 per cent unmapped, counting only the source's zeros. Its
largest gap is a flat grey of the source's own (147 and 148, its two commonest values), which
NASA's caption for PIA19658 names as the gap in coverage: measured on titan.jpg, one region of
1.09 per cent of the pixels, 0.87 of the sphere, at 48-68 N and 37 W to 25 E. The row says 1.1 per
cent and where, and step 1 says how it is counted; commit 302fa96's "the rest under 0.2%" is
therefore not true of Titan.
No behaviour changes but the ETL's log and error wording; the solar ETL passes with the new text.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
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SenrokaiandClaude Opus 5.5
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dadae7b8ca |
Give Haumea's card its three semi-axes beside its mean radius
Haumea is triaxial, 1161 x 852 x 513 km (Ortiz et al. 2017, Nature 550, 219), and is drawn as the
sphere of its volume, 797.6 km. Its card listed "Radius 798 km" under Measured and said nothing of
its shape, which only a code comment and a commit message gave: its long semi-axis is 1.46 times
that radius and its short one 0.64.
BodyRecord takes semiAxesKm, set by the ETL from Haumea's spec, and the card then reads "Mean
radius 798 km" and "Semi-axes 1,161 x 852 x 513 km". Every other body keeps its one Radius row. The
ETL checks that a body's radius is the mean of its semi-axes, the radius of the sphere of the same
volume, to 0.1 per cent (797.6 against 797.62).
Measured on :4301, Haumea's page: "Mean radius 798 km, Semi-axes 1,161 x 852 x 513 km". Test: the
card of Haumea as shipped in bodies.json. Guarded mutants: the semi-axes dropped from the spec (run
through the solar ETL), the row, or the view model, or the label left as Radius, each fail it and
only it; a radius that is not their mean fails the ETL ("Haumea's radius, 1161 km, is not the mean
of its semi-axes").
Horizons gives triaxial radii for Phobos, Deimos, Miranda and Ariel too, which the page parser
already reads into their mean; they are not carried here.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
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SenrokaiandClaude Opus 5.5
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fc7677e715 |
Turn Nereid in the 11.594 hours Kepler measured, where it was drawn still
Nereid's Horizons page states no spin, and the ETL, finding none, left it still; the validator's
comment read that as "Nereid has no spin". Its rotation is measured: Kepler's K2 light curve gives
11.594 +/- 0.017 hours, confirming earlier ground-based periods (Kiss et al. 2016, MNRAS 457, 2908;
arXiv:1601.02395). Its spec now carries that day, as Eris's carries Bernstein et al.'s, and with no
known pole it turns about its orbit normal, as Eris, Haumea and Makemake do. The free-spinner check
accepts it (11.594 hours against a 360-day orbit).
A new validator: a moon without a lock must have a day unless it tumbles, and only Hyperion
("Rotational period = Chaotic") does. Nereid, left without one, fails it: "Moon nereid is drawn not
turning, and is not known to tumble". The renderer spec's example of a body left still was Titan,
said to have no period on Horizons, though it carries its orbit's; it is Hyperion now, and
BodyRecord.rotationPeriodHours says where each kind of period comes from.
Measured: the solar ETL passes; in bodies.json only Hyperion has no rotationPeriodHours; live on
:4301 Nereid's marker turns 60.000 degrees in a sixth of its day. Test: Nereid, as shipped, turns 60
degrees in 1.93 hours. Guarded mutant, the day removed from its spec and run through the solar
ETL: the validator fails, and the suite on the data it wrote fails that test and only it.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
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SenrokaiandClaude Opus 5.5
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e8e857ec25 |
Hold Io and Europa to their own track ceilings, and Hyperion's one-date ceiling to just above its offset
Io's and Europa's periapses turn backwards, held by the Laplace resonance (apsidesRegress), which brings them to 0.07 and 0.23 degrees of Horizons from 1950 to 2100. Nothing guarded the flag: with it dropped the ETL still passed, Io at 0.96 and Europa at 2.24 under the general 3-degree track ceiling, their cards quietly rewriting themselves to "within 1.0" and "within 2.3". They now have ceilings of 0.2 and 0.5, as Tethys has for the term it takes from its W. The comment on the one-date check, which said it catches the periapsis run the wrong way, now says it does not (0.904 against 2.5) and which check does. Hyperion's one-date ceiling was 21 degrees, described as just above its offset on that date, where it is 9.413: the 21 was its worst over twelve dates in an earlier check. It is now 10. Measured on the real catalogue with the solar ETL: Io 0.07, Europa 0.23 at worst, Hyperion 9.413, all passing. Guarded mutants, run through the solar ETL: apsidesRegress removed from both specs fails with "Io's mean elements put it up to 0.96 degrees ... (at most 0.2 expected)"; Hyperion's row misread by 6 degrees of node fails the one-date check at 15.41, which 21 let through. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> |
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SenrokaiandClaude Opus 5.5
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3b4fd1af6c |
Turn each locked moon at its orbit's rate and Iapetus's pole round its orbit, so they face their planets at every date the clock reaches
The IAU gives a locked moon's W the mean motion of whichever orbit its authors had, and JPL's table has another. Near the present the difference is nothing; over the clock's AD 1 to 3000 it turned Proteus's far side to Neptune at AD 1 (146 degrees), Mimas 52 degrees from Saturn and Miranda 23. Iapetus was worse for another reason: its IAU pole is a straight line, 3.9 degrees a century in right ascension, through its orbit normal's 3 439-year circle round the Laplace pole, which by AD 1 has run past the celestial pole (Dec 97.9), 11 degrees off the orbit, with the face 87 degrees from Saturn. Mimas and Iapetus carry mission maps, so a wrong hemisphere was drawn facing Saturn. The ETL's lock check sampled only 1950-2100, so none of it failed. tools/etl/lib/locked-spin.ts, lockedToOrbit, called for every locked moon: - W's rate becomes the orbit's own mean motion, its constant moved so W is unchanged on 2025-01-01; the pole and every periodic term stay the IAU's. A W with a quadratic is left (Phobos's orbit already takes it; the Moon's is its tidal slowing, 0.75 degrees at AD 1). The kernel's rate must be within 1e-5 of the orbit's first (at most 3.4e-6, Iapetus). - Iapetus (poleFollowsOrbit): the pole follows its orbit normal, as a moon in a Cassini state does, in the IAU's own form: sines of the node's angle and four harmonics on right ascension, cosines on declination, fitted to the normal's circle and pinned to the IAU pole at the present; W takes sines of the same angles, fitted to hold the face where it is today. build.ts samples the lock over AD 1 to 3000 (8 114 dates, every 135 days) instead of 1950-2100, and subPlanetLongitudeDeg moved to the lib, shared by both. Measured on the real catalogue: at most 5.36 degrees (Titan) but the Moon 7.62 (its eccentricity, and W's quadratic at AD 1: a new named ceiling of 8), Mimas 8.94 (ceiling 11 -> 9.5) and Iapetus 15.95 (19 -> 16.5, 9.4 of it its row's lag); Proteus's own ceiling of 9 is gone, at 2.66. Iapetus's axis stays within 0.74 degrees of its orbit normal (11.06 before) and its pole is the IAU's at the present to 1e-4 degrees. Live on :4301, the longitude facing the planet at AD 1 / 1000 / 2025 / 2999: Proteus 2.6 / 2.6 / 2.6 / 2.6 (was -146.5 / -72.9 / 2.6 / 74.5), Iapetus -15.9 / -15.4 / -15.3 / -9.3 (-87.0 / -50.9 / -15.3 / 22.8), Mimas 4.1 / 6.8 / 5.7 / 8.4 (48.6 / 29.3 / 5.7 / -13.0), Miranda -0.1 / 2.2 / 0.0 / 1.4 (-23.4 / -9.6 / 0.0 / 12.6); the present is unchanged. The renderer spec now takes the rotational elements from bodies.json too, so no hand copy is left, and a new test turns Proteus, Miranda, Mimas and Iapetus to their planets at AD 1 and AD 3000. Guarded mutants, each run through the solar ETL and then the full suite on what it wrote: lockedToOrbit bypassed (validator: Mimas 52.30, ceiling 9.5; the new test fails), Iapetus on the IAU's straight pole (98.48), and its pole round the orbit without W's terms (73.13); each fails the new test and only it. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> |
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SenrokaiandClaude Opus 5.5
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d449214309 |
Stop calling WASP-108 b imaged, and stop saying no map exists of an imaged exoplanet
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SenrokaiandClaude Opus 5.5
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acc4b928f2 |
Say that Makemake's day is known only to a factor of two, citing both readings
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SenrokaiandClaude Opus 5.5
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4cd08ee324 |
Credit the IAU W on the three moons whose orbits take terms from it, guard Tethys's, and say what Mimas's lock ceiling is
Since
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SenrokaiandClaude Opus 5.5
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48fd6fd0e5 |
Stop telling the reader that the hundred directly imaged exoplanets were never imaged
Every exoplanet card without a map ended "Not an observation — no image of this world exists.",
and
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SenrokaiandClaude Opus 5.5
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d93bb1ee2c |
Say that Pluto's tilt is checked against its own IAU pole, not against Horizons
The ETL's obliquity check, its failure message and the renderer spec's test name all compared Pluto's drawn tilt with "the obliquity Horizons gives", as |
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SenrokaiandClaude Opus 5.5
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a281f22f34 |
Measure every moon and dwarf planet against Horizons from 1950 to 2100, and say on its card how far it strays
The clock reaches AD 1 to AD 3000, but only the planets' cards named a span their elements hold
over; the 25 moons and the four SBDB dwarf planets gave a source and an epoch, though
BodyRecord.orbitSource is documented as "the span they hold over". And the worst offsets the ETL
stated came from twelve New Year's Days: Nereid's year is 360 days, so all twelve fell far from
its periapsis, where a mean ellipse is furthest out. The one date the ETL checked, 2025-01-01, saw
Nereid at 2.6 degrees; it reaches 11.19.
For each moon and each SBDB dwarf planet the ETL now fetches Horizons' ICRF vectors from 1950 to
2100, every other day (daily for Nereid, at an eccentricity of 0.75, and Hyperion, whose row's
eccentricity is a quarter of its real one: every other day gave it 22.14, daily 22.23), and
measures how far the mean elements stray, at the same TDB dates. The card appends it: "JPL SBDB
osculating elements, epoch 2026 Jun 9, within 7.2 degrees of Horizons from 1950 to 2100". Worst
offsets on the real catalogue: the Moon 2.62 (2010 March 27), Phoebe 2.58 (1969, where a comment
claimed "within 2.0"), Phobos 1.26, Mimas 7.43, Iapetus 10.34, Nereid 11.19 (2039 Nov 1),
Hyperion 22.23 (2055 Feb 26), Ceres 7.12 (1953); Io 0.07, Titan 0.06, Eris 0.06.
build.ts recomputes each from the same Horizons positions and fails if an orbit other than
Standish's names no span, if a card states less than it strays, or if a body passes its ceiling:
3 degrees, and Hyperion 23, Nereid 12, Iapetus 11, Mimas 8 and Ceres 8, each explained. The
2025-01-01 check stays for reading errors, its comment no longer passing one date's offsets off as
worst ones. The Sun's note says the moons' and those four's elements were checked from 1950 to
2100, and the date field's description that each card says how far its orbit strays over that span.
In the running app Ceres's, Phobos's and Nereid's cards end "within 7.2", "1.3" and "11.2 degrees
of Horizons from 1950 to 2100".
The CLOCK_WINDOW comment also had the calendars the wrong way at AD 1: proleptic Gregorian dates
are two days behind the Julian calendar there, level from AD 200 to 300, and ten days ahead by
1582. It now says so, and names Ceres's drift where it named Phobos's, which its orbit now carries.
Controls: the ETL measuring nothing fails ("Ceres's orbit ... names no span it holds over"),
rounding the stated figure down fails on Ceres (7.1 against 7.12), and Nereid held to the general
ceiling fails at 11.19; the note and the date field without the span fail their named tests.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
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SenrokaiandClaude Opus 5.5
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97b8dd9dc8 |
Turn the Sun about its IAU pole, once in 25.38 days, as every planet already is
Every body with IAU elements was turned by its pole and W, but the Sun, which is the system's star marker and no BodyRecord, was built with an identity rotation and never touched: its pole pointed at RA 90, Dec 0, 115.03 degrees from the WGCCRE 2015 solar pole (RA 286.13, Dec 63.87), and it stood still where its W turns 14.1844 degrees a day. SUN_ROTATIONAL_ELEMENTS carries NAIF body 10 from pck00011.tpc, and the ETL fails if they are not the kernel's. The scene turns the star marker by bodyOrientation each tick when the star is the Sun, as the renderer turns the planets. In the running app the Sun's drawn pole lies on the IAU's (0.00 degrees) and its map turns 14.1844 degrees between 2026-01-01 and 01-02. The map's longitudes are Solar System Scope's, not Carrington's, so the phase of W is not the Sun's own; the pole and the rate are. Controls: leaving the marker unturned fails "turns the Sun about its IAU pole, once in 25.38 days"; the app's elements off the kernel's (W rate 14.18) fails the ETL. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> |
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SenrokaiandClaude Opus 5.5
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8e3a494fe9 |
Print Hyperion's eccentricity as JPL measures it now, 0.105, not the archived row's 0.023
The card listed Hyperion's eccentricity under "Measured" as 0.023: the archived JPL satellite row
the orbit is drawn from gives 0.0232. JPL's current table (SAT441) gives 0.105, and Horizons'
osculating orbit ranges 0.074 to 0.132 from 1980 to 2100 (0.1099 on 2025-01-01). The row stays
the orbit: with 0.105 put into it, Hyperion is further from Horizons, not nearer (median 9.6
degrees against 7.8 over 1980-2100, as a reviewer measured), so only the card changes.
BodyRecord.measuredEccentricity carries the figure the card prints where it is not the orbit's
own; the ETL sets it for Hyperion, and buildBodyViewModel prints it. build.ts now checks every
card's eccentricity against Horizons' osculating one on 2025-01-01, within 0.03: measured at most
0.0151 (Phoebe, and the Moon, whose eccentricity swings) once Hyperion prints 0.105, where the
row put it 0.0867 out. The live Hyperion page reads "ECCENTRICITY 0.105".
Controls: the ETL with Hyperion on its row's figure fails ("Hyperion's card gives an eccentricity of
0.0232, where Horizons' osculating orbit has 0.1099"); the view model ignoring the field fails
"prints the eccentricity measured for a moon whose orbit keeps an older one".
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
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SenrokaiandClaude Opus 5.5
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f655a4c0f7 |
Turn Eris once in 15.77 days, locked to Dysnomia, not in the 25.9 hours the SBDB flags as unreliable
Eris took its day from the SBDB's rot_per, 25.9 hours, whose own note reads "Result based on less than full coverage, so that the period may be wrong by 30 percent or so" (Roe et al. 2008). Eris is locked to Dysnomia: its light curve repeats every 15.771 +/- 0.008 days (Bernstein et al. 2023, PSJ 4, 115), Dysnomia's 15.78590-day orbit (Holler et al. 2021; Szakáts et al. 2023, A&A 669, L3). It was drawn turning 14.6 times too fast. Eris's BodySpec now carries that day, 378.504 hours, cited as its radius already cites Sicardy et al., and a spec's measured day comes before its source's. build.ts checks that Eris's day is Dysnomia's orbit within 0.2 per cent. In the running app Eris turns 5.707 degrees in six hours, as 15.771 days gives; on 25.9 hours it turned 83.4. Makemake's SBDB period, 22.83 hours, carries the same flag; it is Hromakina et al. 2019's own result and nothing later overturns it, so it is kept. Control: Eris on the SBDB's period fails the ETL: "Eris turns once in 1.079 days". Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> |
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SenrokaiandClaude Opus 5.5
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f8ee3ac3ab |
Move Mimas, Tethys and Phobos along their orbits by the terms their IAU W already carried
The IAU W of a locked moon follows its mean longitude, so a term of W that is the moon running
ahead of and behind its mean motion is its orbit's too. Two were in bodies.json's W and in no
orbit: the 71-year libration of the Mimas-Tethys 4:2 resonance, -44.85 degrees on Mimas and
+2.23 on Tethys on the angle S5 = 316.45 + 506.2 T of pck00011.tpc, and Phobos's tidal
quadratic, 9.536e-9 degrees a day squared about J2000. JPL's satellite table has a column for
neither. orbitalTermsOfPrimeMeridian now turns each into the row's meanAnomalyTerms about the
row's own epoch (Phobos's 1950 row gets the quadratic re-centred, which adds to its mean motion
and mean anomaly at the epoch), and the ETL takes them for the three moons named in their specs.
Against Horizons: Mimas on 2026 May 27, near the libration's extreme, 2.24 degrees instead of
43.3; Tethys the same day 0.18 instead of 2.05; Phobos in 2100 1.25 instead of 11.1. On the
ETL's 2025-01-01 check Mimas is 1.56 degrees, so its named 46-degree ceiling is gone. The renderer
spec freezes the Mimas and Phobos vectors.
The day-equals-orbit check checked a number that turns no locked moon: since
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SenrokaiandClaude Opus 5.5
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1c86584642 |
Carry every body's IAU rotational elements, read from NAIF's kernel of the 2015 report
bodies.json now holds, for 33 of the 38 bodies, the pole right ascension and declination and the prime meridian W of the IAU WGCCRE 2015 report (Archinal et al. 2018), with their rates and the periodic terms. They are read from NAIF's pck00011.tpc, which carries the report in a form a program can read, periodic terms and their angles included. Hyperion (chaotic), Nereid, Eris, Haumea and Makemake have no model in the report. The parser, src/app/shared/astro/rotational-elements.ts, sits beside the other source readers so the unit suite covers it. It reads data blocks only where \begindata stands alone on a line, as the kernel's own prose mentions the token mid-sentence. It reads the Fortran exponent (the Moon's -1.4D-12 d² term) and the degree-2 angles of the Mars system, where Phobos's tidal acceleration lives. NAIF numbers a small body 2 000 000 past its catalogue number, so Ceres is 2000001. Periodic terms under 0.01 degrees are left out. 0.01 degrees moves a point by 0.11 px on the largest body ever drawn (Jupiter at 641 px of radius). That drops 32 terms: - Mercury: 4 (0.0011 degrees and less) - the Moon: 8 of 13 (0.0072 and less) - Mars: 13 (0.00024 and less); its three 0.42-1.59 degree long-period terms stay - Phobos: 1 (0.0063) - Jupiter: 5 (0.0022 and less) - Europa: 1 (0.009) Kept, among others: Mimas's 44.85-degree libration, Triton's 32-degree precession, Miranda's 4.4 and Phobos's 1.14-degree libration. build.ts now checks the elements against Horizons on the real catalogue: - Every body but those five carries elements, and they do not. - The IAU day, 360 over W's rate, is within 1e-4 of Horizons' period. Measured: at most 1.8e-5 (Jupiter). Neptune gets a 0.01 ceiling: 0.89 per cent, because the report takes Karkoschka's 15.9663 h where Horizons keeps Voyager's 16.11. - The spin axis, the pole turned end for end where W runs backwards, is within 0.1 degrees of Horizons' obliquity. Measured: at most 0.058 (Venus, 177.358 against 177.3); Uranus 97.771, Pluto 119.610, Earth 23.435. Full npm run etl passes. Three mutants each fail it on the named check: - W's sign dropped: "Venus's IAU spin axis is 2.642 degrees". - Ceres looked up by catalogue number: "Body ceres has no IAU rotational elements". - W's rate read per century: "Mercury's IAU day ... 3.65e+4". Nothing is drawn from these yet. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> |
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SenrokaiandClaude Opus 5.5
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1d42be2ad5 |
Add Charon, the moons of Uranus, Saturn's other large moons and the four dwarf planets past Pluto's table
The solar system stopped at 18 bodies: Pluto without Charon, Uranus without a moon, Saturn with Titan alone, no dwarf planet but Pluto (audit #22). bodies.json now holds 38: the eight planets, the five IAU dwarf planets, and every moon in JPL's mean-element table more than 100 km in mean radius. New: Ceres, Eris, Haumea, Makemake; Mimas, Enceladus, Tethys, Dione, Rhea, Hyperion, Iapetus, Phoebe; Miranda, Ariel, Umbriel, Titania, Oberon; Nereid, Proteus; Charon. Search finds each by name (it indexes bodies.json), each has a body page, and the Sun's system draws them. Where they come from - Moons: the same archived JPL satellite table as the others. Uranus's and Pluto's are given against the planet's equator, with the IAU WGCCRE 2015 poles: Pluto's as the IAU gives it (132.993, -6.163), Uranus's at the end the table measures inclinations from (77.311, 15.175) with its nodes counted 180 degrees on, from the IAU pole's crossing; read without that offset every Uranian moon was 180 degrees from Horizons at every date from 1980 to 2100. - Two rows are corrected where they disagree with JPL's own ephemeris and the reason is known. Pluto's section prints epoch 2000 Jan 1.0; JPL's current table gives Charon's as 2000-01-01.5, and at 1.0 Charon was 27.8-28.2 degrees from Horizons at every date, half a day of its motion. Phoebe's mean motion gives 548.02 days where its Horizons page and the current table give 550.30 (the table's own note says its source misstated retrograde moons' mean motions); on the row's figure Phoebe was 24.6 degrees out by 2025 and 100 by 2075. - Dwarf planets: JPL SBDB osculating heliocentric elements with their epoch (2026 Jun 9), carried at their own n. Against Horizons (heliocentric, 1950-2300; the clock only runs forward from now): Ceres 0.02 degrees in 2025, 1.9 in 2050, 4.0 in 2075, 5.3 in 2100, 11.6 in 2200 (Jupiter pulls on it and nothing here carries that); Eris within 0.06 to 2100 and 0.5 to 2300; Haumea within 0.35 to 2100; Makemake within 0.25 to 2100 and 1.7 by 2200. - Size and spin: Horizons pages for the moons (Charon 606 km, Miranda 235.7 as the mean of its three axes). The SBDB for Ceres (469.7 km, 9.074 h) and for the other three's spins (Eris 25.9 h, Haumea 3.915 h, Makemake 22.83 h). Neither source nor the WGCCRE 2015 report has a radius for Eris, Haumea or Makemake, so each carries its stellar-occultation measurement: Eris 1163 km (Sicardy et al. 2011), Makemake 715 (Brown 2013, the mean of 1434 x 1434 x 1422 km), and Haumea 797.6, the radius of a sphere of its volume: it is triaxial, 1161 x 852 x 513 km (Ortiz et al. 2017), and is drawn as that sphere. - Rotation uses the branch's model. Every moon is locked except three: Hyperion's page says "Chaotic" and Nereid's gives no spin, so both are left still; Phoebe turns in 9.274 h. - Charon carries massRatio 0.12205, the GM ratio of the two Horizons pages (106.10 / 869.326), so it and Pluto are drawn round their barycentre 2 131 km from Pluto's centre. Validators (tools/etl/build.ts, on the real catalogue; full npm run etl passes) - Offsets from Horizons on 2025-01-01, new bodies: dwarf planets at most 0.016 degrees (Ceres), under the 0.25 ceiling; moons Dione 0.009, Ariel 0.058, Rhea 0.070, Charon 0.111, Oberon 0.142, Titania 0.185, Umbriel 0.219, Proteus 0.245, Enceladus 0.309, Phoebe 0.984, Miranda 1.162, Tethys 2.042, under the 2.5 ceiling, which is unchanged. - Four moons get their own ceiling, each just above its worst offset at twelve dates from 1980 to 2100 and each named with its reason: Mimas 46 (measured up to 44.7: its resonance with Tethys swings its longitude 44 degrees either way over 70.8 years, which the table has no column for), Hyperion 21 (20.2; held in resonance by Titan, and the row's eccentricity 0.0232 is under a quarter of the current table's 0.105), Iapetus 11 (10.1; the row sits 9.4 degrees behind Horizons at its own epoch and keeps that, with its plane within 0.07 degrees and its period within 0.001 per cent), Nereid 3 (2.6 in 2025; eccentricity 0.75). - New checks: every body has a radius over 0 (Charon's would have been 0 before the page parser learnt its form); a freely spinning moon is not locked; a moon with a mass ratio puts the barycentre outside its planet; there are 5 dwarf planets. - Negative controls, each a full npm run etl on the real catalogue refused with the named message: Uranus's node offset removed (Miranda 172.50 degrees), Charon at the printed epoch (28.08), Phoebe on the row's mean motion (24.61), Charon's radius unread (no radius), free spinners locked (Hyperion), mass ratio inverted (barycentre 17 460 km out). Measured in the running app (port 4311): the Sun's system has 38 members ("13 + 25 moons"); Charon comes back to within 0.0004 degrees of where it started after 6.38723 days and is 179.98 degrees round after half that; Pluto is 2 130.6 km from the barycentre and Charon 17 456.8, exactly opposite; Saturn's moons in order of distance now: Mimas 185 617 km, Enceladus 238 042, Tethys 294 648, Dione 376 805, Rhea 526 964, Titan 1 231 389, Hyperion 1 470 453, Iapetus 3 637 059, Phoebe 11 740 900. At the arrival framing the dwarf planets are held at the 3 px floor and the moons at 1.5 px, half their planet's drawn radius, the scene's existing rule. Searching Charon, Enceladus, Ceres, Titania, Makemake and Phoebe each finds the body; the body pages show Charon 6.39 d and 606 km, Titania 8.71 d, Ceres 4.6 yr and 470 km, Haumea 283 yr and 798 km, Hyperion 21.3 d, each with its orbit source. Long tasks on entering: see the previous commit. The Sun's note now says the four dwarf planets are on the SBDB's osculating elements. Holding Eris's orbit, the arrival framing widens: 192 AU of range on a 1600 x 1000 window, under the 200 AU ceiling. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> |
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SenrokaiandClaude Opus 5.5
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b0d7989c6f |
Read moons given against their planet's equator, and dwarf planets from the Small-Body Database
Two sources the missing bodies need, read and tested before any body uses them.
JPL's satellite table gives Uranus's and Pluto's moons against the planet's equator ("Mean
equatorial orbital elements") rather than a Laplace plane, and does not print that equator's
pole. parseSatelliteMeanElements now takes the pole from its caller for such a section and reads
the row against it exactly as against a Laplace plane's; it throws if a section is equatorial and
no pole was given, or a pole was given for a section that is not. Read as ecliptic elements, which
is what the old code would have done, Titania is 88 degrees from Horizons on 2025-01-01. The
section's plane is now the nearest heading above the row, with the ecliptic as before where there
is none.
Ceres, Eris, Haumea and Makemake are in none of Standish's tables. parseSmallBodyElements reads a
JPL SBDB answer (sbdb.api?sstr=...&phys-par=1&full-prec=1): the osculating heliocentric elements
against the J2000 ecliptic, carried round at their own n with nothing turning, and half the
published diameter and the rotation period where the answer has them. full-prec matters: without
it SBDB rounds to three figures, Ceres's n to 0.214 degrees a day for 0.2143045, 1.1 degrees out
within a decade. The fetcher, tools/etl/lib/mean-elements.ts, caches the answer like the others.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
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SenrokaiandClaude Opus 5.5
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cdc0cf4678 |
Read the Horizons pages the missing moons are written in, and give triaxial bodies their mean radius
The pages of the moons this branch is about to add state their size and spin in forms the ETL
did not read. Charon's gives "Radius (km, IAU2015) = 606", which none of the radius patterns
matched, so it would have come out at radius 0. Phoebe's gives "Rotational period = 9h 16.438 m",
which the hours-or-days pattern read as 9 hours flat instead of 9.274. Pluto's and the moons' GMs
are now read too ("GM (planet) km^3/s^2 = 869.326" on Pluto's page, "GM (km^3/s^2) = 106.10" on
Charon's), for placing a pair's barycentre.
Miranda and Ariel, like Phobos and Deimos already, give three semi-axes, "240x234.2x232.9". The
first figure was taken as the radius, which is the longest axis. A triaxial body now gets the
radius of the sphere of its volume, the cube root of the product, which is how the IAU states a
mean radius. That changes two bodies already shipped: Phobos 13.1 -> 11.06 km (IAU 11.08) and
Deimos 7.8 -> 6.20 km (IAU 6.2). Nothing else in bodies.json moves.
The page parsers move from tools/etl/lib/horizons.ts to src/app/shared/astro/horizons-page.ts,
as the mean-element parsers did, so the unit suite runs their tests; the ETL imports them. A
small body's command ("1;" for Ceres) is now URL-encoded: sent raw, the semicolon made Horizons
refuse the request ("one or more query parameter was not recognized").
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
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SenrokaiandClaude Opus 5.5
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48319c3fe2 |
Move the solar system on JPL's mean elements, so it stays right as the clock runs
Every body carried one set of osculating elements from Horizons at 2025-01-01, run forward by
Kepler with a GM from a table of mass ratios. That set is exact at its instant and drifts from
then on, and the clock now runs a month a second: the Moon, with Earth's mass ratio lacking its
own and the osculating axis, went round in 27.70 days instead of 27.32, 66 degrees out after a
year, and its locked face was spun at the same wrong rate.
Planets and Pluto now take Standish's Table 2a/2b ("Keplerian Elements for Approximate
Positions of the Major Planets"): elements against the J2000 ecliptic, their rates per century,
and the b, c, s, f terms of Jupiter to Pluto, fit for 3000 BC to AD 3000. Table 1 is closer near
the present (Saturn 0.23 degrees at worst 1950-2100, against 0.32 here) but is only fit for
1800-2050, and by AD 3000 has Saturn 4.3 degrees out where Table 2 holds every planet within 0.3.
The moons take JPL SSD's satellite mean elements: sidereal mean motion n to ten figures, the
periods of their node and periapsis, and each one's local Laplace plane by its pole. They
propagate with n itself, never a GM: gmForParent and its mass table are gone. Horizons still
gives size, spin and obliquity.
Both tables are read from the Internet Archive's copy of JPL's pages, pinned to one capture: the
live approx_pos page has dropped Pluto, and the live sats/elem page has dropped n and rounds the
period to four or five figures (Phobos 0.3187 d, a revolution out within a decade).
What the tables leave implicit, measured against Horizons before it was accepted:
- The precession periods are magnitudes. A node regresses on a prograde orbit and advances on a
retrograde one; a periapsis advances except where a resonance forces the eccentricity. Io's
and Europa's follow their conjunction line backwards at 2 n(Europa) - n(Io) = 0.74 degrees a
day, which is exactly the 1.625- and 1.394-year periods in the table. Read as advancing, Io
was 0.9 degrees out and Europa 2.1.
- On a retrograde orbit the node's turning is added back to the mean anomaly. Taken off, Triton
drifted a degree a year, 105 degrees by 2100.
- The Laplace frame's x axis is where the plane rises through the ICRF equator, RA of the pole
plus 90. Read against the ecliptic, Io was 2.8 degrees out, Phobos 54 and Titan 127.
Orbit lines are now drawn in their own plane and turned by a quaternion each tick, so a turning
node carries the line with the body: fixed at one date, the Moon's line would be up to 69 000 km
off it nine years on. The Earth row is the Earth-Moon barycentre, 4 700 km from Earth, 0.002
degrees from the Sun. A tidally locked moon's day is now 360 / n, its sidereal period (the Moon
27.321662 d), so it stays locked to the orbit it is drawn on.
Angular error against Horizons VECTORS (ICRF, TDB; heliocentric for planets, planet-centred for
moons), degrees, read from the live renderer's markers in the running app:
body 1950-01-01 1975-01-01 1987-07-23 2000-01-01 2025-01-01 2037-03-06 2050-01-01 2075-01-01 2100-01-01 max
mercury 0.004 0.002 0.003 0.002 0.002 0.001 0.000 0.002 0.000 0.004
venus 0.003 0.007 0.003 0.004 0.004 0.004 0.003 0.004 0.004 0.007
earth 0.003 0.008 0.002 0.005 0.004 0.009 0.003 0.002 0.003 0.009
mars 0.009 0.010 0.008 0.024 0.009 0.012 0.009 0.011 0.028 0.028
jupiter 0.063 0.030 0.171 0.135 0.013 0.020 0.056 0.041 0.075 0.171
saturn 0.080 0.064 0.018 0.320 0.066 0.114 0.044 0.164 0.177 0.320
uranus 0.018 0.169 0.068 0.050 0.101 0.015 0.141 0.017 0.114 0.169
neptune 0.070 0.028 0.004 0.021 0.036 0.037 0.013 0.029 0.072 0.072
pluto 0.045 0.054 0.041 0.033 0.019 0.020 0.023 0.027 0.026 0.054
moon 0.486 1.928 0.127 0.631 1.407 1.086 0.720 0.339 1.180 1.928
phobos 2.068 0.294 0.881 1.113 0.313 0.636 2.089 5.862 11.099 11.099
deimos 0.077 0.043 0.310 0.066 0.164 0.068 0.034 0.468 0.044 0.468
io 0.021 0.015 0.010 0.019 0.009 0.035 0.006 0.011 0.022 0.035
europa 0.036 0.039 0.053 0.064 0.078 0.032 0.006 0.034 0.044 0.078
ganymede 0.132 0.103 0.018 0.007 0.023 0.054 0.091 0.118 0.044 0.132
callisto 0.040 0.019 0.023 0.019 0.038 0.008 0.060 0.119 0.056 0.119
titan 0.003 0.019 0.023 0.023 0.027 0.028 0.048 0.008 0.014 0.048
triton 0.051 0.029 0.009 0.021 0.052 0.048 0.063 0.089 0.137 0.137
Three miss what was hoped for, and why:
- Jupiter 0.17, Saturn 0.32, Uranus 0.17 against the 0.1 hoped for: short-period perturbations
of the giants by one another, which no Keplerian fit carries. Standish states his own Table 2
errors as 600, 1 000 and 2 000 arcseconds (0.17, 0.28, 0.56 degrees). Out to AD 3000, measured
at 1800, 2200, 2400, 2600 and 3000, every planet stays within 0.3.
- The Moon, 1.9: evection (1.27) and variation (0.66), which a mean ellipse leaves out.
- Phobos, 2.1 until 2050, then 5.9 in 2075 and 11.1 in 2100, growing as the square of the time:
its tidal acceleration, which the table has no column for. Its elements are MAR080's, epoch
1950. The map's dates are also UTC where the elements are TDB, 69 s today,
which is 0.9 degrees of Phobos and nothing for anything else.
Held in place by:
- build.ts: each body's mean elements against Horizons' own osculating elements on the ETL's
2025-01-01, at most 0.25 degrees for a planet and 2.5 for a moon (measured: Uranus 0.101, the
Moon 1.407; a regressing Triton node reads 10.24 and fails), and every moon's day equal to its
sidereal period (a 1% error fails).
- Unit tests freezing nine Horizons vectors (Earth 2100, Jupiter 1950, Saturn 2075, Pluto 1975,
the Moon 2050, Io and Europa 1950, Titan and Triton 2100) through SystemOrbitsRenderer, the
Moon kept on its own turning line, the retrograde rule, the Standish terms, the Laplace frame,
and both table parsers. Nine mutants each fail the test named for them, and the two
validators each refuse a mutated build of the real catalogue.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
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SenrokaiandClaude Opus 5.5
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c38a42cbcb |
Fix what the review of this branch found, starting with the pick rule it only claimed
The off-screen rule for clicks was described in
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SenrokaiandClaude Opus 5
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225d676ab0 |
Turn each body at its own rate, from Horizons' own figures
The view had one rotation in it — the planet on the detail page, at 0.08 rad/s, a number with no source. Nothing in the system view turned at all. The data was already on disk: every cached Horizons page carries how its body spins, in one of five forms. The rate in radians per second is preferred where it appears, because it is signed — that is how Venus and Uranus are known to turn backwards — then a period in hours or days, then the `9h 55m 29.711 s` the giant planets use, and finally the word every major moon here carries instead of a number: Synchronous. A tidally locked moon's day is its orbit, so Kepler supplies it from the elements already parsed and the parent it goes round. Seventeen of the eighteen bodies come out within 1% of their published period — Earth 23.934 h, Jupiter 9.925 h, Venus -5832.5 h, Io 42.5 h, Callisto 400.5 h. Titan is the exception: its page states no period at all, so it is left still rather than turned at an invented rate. The axis is the orbit normal tilted by the obliquity about the orbit's ascending node, which is where an obliquity is measured from and the only line in the orbit the elements name. The phase at the epoch is published for none of these bodies, so the face turned toward the camera is not a claim; the rate and the direction are. At true rates nothing is visible moving — Earth turns 15 degrees an hour. A clock the reader can run faster is the next piece, and the audit asks for it anyway. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016jxMkwA2rbicdGxHosecYi |
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SenrokaiandClaude Opus 5
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1a5785fb63 |
Keep the row cap live for the queries that can reach it
Gating it on `jobsQuery` switched it off for every override that *widens* the query — which is the only way to fill `select top N` at all. `ETL_GAIA_MAGNITUDE_LIMIT=14` asks for 500 000 rows, the sky holds more, and the answer is the limit rather than the filters: exactly what the tripwire is for, and it no longer fired. It now reads the row limit itself, so only a deliberately smaller slice is silent. Measured with a synthetic answer of exactly 500 000 rows in the cache, under the key the widened query hashes to: refused. With the `jobsQuery` gate back, the same run keeps 500 000 Gaia stars and goes on to publish them. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016jxMkwA2rbicdGxHosecYi |
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SenrokaiandClaude Opus 5
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b7f277ea04 |
Answer the review: a short answer makes more survivors, and must not be skipped
Three things this got wrong. The direction: truncating Gaia leaves the HYG rows whose counterpart it dropped without one, so survivors rise — 10 886 today, 12 711 at half the rows, 16 258 at a third — which the comment claimed was the other way, and which decides whether the 15 000 ceiling can be leaned on at all (it catches a truncation past about two thirds, and nothing shallower). The throw: `fetchStars` catches everything a source throws and skips it, so a truncated CSV was reported as "the archive was unreachable" one step after `writeStarAssets` had already overwritten the published catalogue. Marked with `GaiaAnswerError` and rethrown there, so an answer that cannot be worked with fails the run where it happened. Measured end to end in a throwaway working directory, 300 000 rows in the cache: fails, names the cache file to delete, assets untouched. With the rethrow taken back out again: assets written, then "the archive was unreachable". The row limit: `rows.length >= ROW_LIMIT` is true for every reduced ETL_GAIA_ROW_LIMIT, so the tripwire fired on exactly the deliberate slice the override exists for — and told the operator to raise it. Gated on the same flag as its neighbour. `ETL_GAIA_ROW_LIMIT=20000` now runs through; without the gate it dies on the limit it was given. Also: the row floor names the one cache file it is about rather than a glob that takes the Hipparcos cross-match with it, and says an edited query is a third reason it can fire — DEFAULT_QUERY_ROWS now sits under the query it counts. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016jxMkwA2rbicdGxHosecYi |
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SenrokaiandClaude Opus 5
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44f6a8d086 |
Refuse a Gaia answer that came back short, and read the body inside the retry
The merge gate asks whether Gaia contributed any stars, never how many. The TAP service truncates on its own timeout and still serves a well-formed CSV with a 200, ordered by magnitude — so a half answer is the bright half, which is the half HYG overlaps. Every gate passes: Gaia stars are present, HYG survivors go down rather than up, unmerged twins can only fall. The weekly job would publish a catalogue missing two hundred thousand stars and the runner would cache it for the weeks after. `fetchGaiaStars` now refuses fewer than 95% of the 412 765 rows its query holds, as its sibling query already did, and refuses an answer that fills the row limit. `fetchText` retried the request but not the body: a connection reset part-way through the 57 MB CSV rejected out of the loop, with no wait and no second attempt. The read now happens inside it. Also corrected: the merge gate's account of the HYG survivors (two thirds of them are stars Gaia measures but the main query never downloads, since Gaia puts them past the 250 pc cutoff), and the refresh workflow's comment on what happens when the archive is unreachable. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016jxMkwA2rbicdGxHosecYi |
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SenrokaiandClaude Opus 5
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4eb61ff58e |
Draw each HYG star at Gaia's distance, and keep the ones Hipparcos misplaced
HYG and Gaia were both cut at 250 pc, each on its own distance. A star Hipparcos put at 200 pc and Gaia at 300 was kept by the first, never downloaded from the second, and drawn at 200. That is where 83% of the 9 691 mid-magnitude HYG stars without a Gaia counterpart came from, and at the median Hipparcos had them a third too close. The mirror case, Hipparcos outside and Gaia inside, dropped the HYG row and left its Gaia entry anonymous. Gaia's own Hipparcos cross-match (hipparcos2_best_neighbour, a fixed DR3 table of 99 525 rows) gives a usable Gaia distance for 97 751 of them. placementDistancePc keeps a star either survey puts inside the cutoff, and draws every kept star at the better measurement, inside the cutoff or not. 57 121 HYG stars now sit at Gaia's distance. 6 833 of them are past 250 pc: Zet Per 230 -> 259 pc, 35 Ori 137 -> 330, 44 Cnc 223 -> 613, and the farthest, HIP 69445, at 8.7 kpc. 3 666 stars that Hipparcos put outside are now kept, and 3 656 of them give a Gaia entry its name. The cross-match is required rather than skipped when unreachable. Without it, every one of those stars would move back to its Hipparcos distance, and the published map would flip with the archive's availability. The ESA TAP answered it with a 500 at first and in 102 s on the next try. So fetches now retry 5xx and network failures twice, after 30 s and 120 s, in the fetch every source goes through. The refresh job also carries the Gaia DR3 responses from run to run in the Actions cache: the release is frozen, and a live re-fetch has already reproduced stars.bin byte for byte. 423 651 stars (+10), 61 168 HYG rows folded into Gaia entries (+3 656), 351 597 unnamed designations (-3 656). 10 886 HYG survivors and 23 unmerged pairs under an arcsecond, both inside the merge gate's ceilings. The same 1 972 exoplanets have a host; KELT-4 A b and MWC 758 c now sit on their named star. The HUD's "Radius" becomes "Survey radius": 250 pc is where Gaia is surveyed to, and no longer the edge of the map. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016jxMkwA2rbicdGxHosecYi |
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SenrokaiandClaude Opus 5
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29d3ddb6ef |
Say so when Gaia is missing, rather than as 68 000 unmatched stars
With the merge gate in place, a Gaia DR3 outage no longer ships a HYG-only catalogue: the ETL skips the unreachable source, and validateMerge then fails on the survivor count. That is the right outcome and the wrong message: "68 000 HYG stars found no Gaia counterpart" sends the reader looking at the merge. Gaia contributing nothing is now checked first, by name. Two comments said Gaia was best-effort, in data-refresh.yml and on the merge in fetchStars. They now say what happens instead. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016jxMkwA2rbicdGxHosecYi |
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SenrokaiandClaude Opus 5
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f935bae3b3 |
Fail the ETL on a merge that keeps the same star twice
The catalogues are regenerated by a scheduled job that pushes straight to main once the unit suite and a production build pass in the same run. Both passed, every Monday, on a catalogue that carried 23 000 stars twice: the suite tests code against fixtures, and no fixture is 400 000 real stars. Nothing between the ETL and the map ever looked at what came out. Two numbers now have to hold, and each is the signature of a way the merge has actually failed here. Different catalogues placing a star within an arcsecond of each other is never two stars at this depth, and one catalogue does not list a star twice, so every cross-source pair that close is a miss. Nineteen survive today — each a second HYG row wanting a Gaia entry that already absorbed one, which is how Gliese lists some doubles — against 1 112 in the catalogue on main, where a Hipparcos parallax off by half outvoted a direction that agreed to a hundredth of an arcsecond. The ceiling is 100. The epoch failure leaves no close pair at all, because sixteen years of proper motion had already carried the two entries tens of arcseconds apart. What it leaves instead is HYG rows that found no counterpart: 36 056 on main against the 10 876 Gaia genuinely lacks — the stars it saturates on and the red dwarfs past its magnitude cut. The ceiling is 15 000. The pair sweep sorts by declination and walks a one-arcsecond window, so it costs about 300 ms on 423 641 stars — cheap enough to run on every ETL, which is the point: the gate has to sit where the bot already is, before the push, because a GITHUB_TOKEN push fires no CI of its own. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016jxMkwA2rbicdGxHosecYi |
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SenrokaiandClaude Opus 5
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037545d036 |
Answer the review: a name two stars answer to names neither, and NaN is not a proper motion
Three guards the matcher was missing, none of which changes a byte of the regenerated data — the ETL re-run after them is identical — and all three now have a test that fails without them. A proper motion that is not a number poisoned every comparison rather than one: NaN loses every `<` it appears in, so `cosine < minCosine` was false for every star, each one reached the distance guard, and the last one in catalogue order won — a confident wrong answer, order-dependent, where the honest answer is "no match". The archive's own parser never produces one (parseOptionalNumber maps a blank cell to undefined), but the matcher is exported for offline re-cross-referencing and a caller reaching for bare Number() is exactly the coercion the CSV helper documents as having caused two prior bugs. An unusable motion now reads as no motion. Normalizing a name strips the dot, so `Gl 55.2` and `Gl 552` — two stars 135 degrees apart — share one key, and the index kept whichever came last; 64 such groups exist in the catalogue, among them `Gl 84.1A`/`Gl 841A` and `HD 96600` twice. A name that names two stars names neither, so ambiguous keys are dropped and the query goes to the sky, where direction settles it. No archive hostname lands on one today, which is why the data is unchanged. And the cache is keyed by the whole request rather than the query alone, here and in gaia.ts: fetchTextCached records only that some response arrived, so an endpoint edit would have kept serving the old host's bytes — the same silent staleness the query hash was added to close. The tests now discriminate what the comments claim. Eight mutants, each caught: judging only the published position, only the carried-back one, judging each star on its worse epoch rather than its better, letting a distance-rejected star claim best-so-far and shadow the true host behind it, an unguarded proper motion, a last-wins name index, a fixed angular tolerance instead of a transverse one, and no distance guard at all. The GJ 887 test grew a decoy standing halfway along the star's own track: it is nearer than Lacaille 9352 at the published position and nearer at the worse of the two epochs, so it wins unless both epochs are tried and the better one decides — the property the test's comment had been claiming untested. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016jxMkwA2rbicdGxHosecYi |
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SenrokaiandClaude Fable 5
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080bbe16dc |
Match exoplanet hosts on the sky, at both epochs the archive might mean
The host cross-reference matched in 3D, nearest star within half a parsec. That is the wrong space for the same reason the star merge learned it: a direction is measured, a distance is inferred. At 170 pc half a parsec is a ten-arcminute cone, wide enough to hand the planets of stars our catalogue does not carry to whatever bright star floats nearest — HATS-6 b sat on HD 39500, seventy arcseconds away. At 60 pc it is tighter than the routine disagreement between the archive's Hipparcos distances and our Gaia ones, which is how four bright giants (7 CMa, HD 81688, omi UMa, xi Aql) lost their planets and GJ 15 A's landed on a neighbouring entry. Hosts are now resolved like stars are merged: by name first, then the nearest star on the sky within a transverse budget — angle times the archive's distance, 0.01 pc — whose distance does not flatly contradict the archive's (the merge's own 50 % ratio). The budget is transverse because the dominant error is proper motion over an epoch difference, a physical displacement that is the same in parsecs at every distance: as an angle it is 60" for Proxima and 2" for a host at 100 pc. Measured on the 504 hosts whose archive name matches a catalogue name outright, true pairs reach 3.4e-3 pc; shifting every host a quarter of a degree finds nothing else within 0.01 but Proxima's own entry, whose budget at 1.3 pc is wider than the shift. The archive never says which epoch a position is for, and they are mixed: alf Tau and GJ 273 publish J2000, HD 133131 and TOI-2459 publish Gaia's J2016. So the query asks for sy_pmra/sy_pmdec too, tries each position at both ends of those sixteen years, and judges a star on whichever is closer. Guess one epoch and a fast star's planets land on a companion: J2016 puts Aldebaran's on Gl 171.1B, J2000 puts GJ 15 A's on a Gaia entry 15.9" out. 1 972 of 6 354 planets now sit on a host, 1 548 before: 432 gained, 26 on a better star (GJ 15 A to Groombridge 34, GJ 676 A off its companion, HD 19994 to 94 Cet), 8 lost — six false 3D matches to stars the catalogue never contained, and GJ 273 b/c, whose archive row says 5.92 pc for Luyten's Star at 3.79: a distance in flat contradiction is exactly what the ratio guard exists to refuse, and the number to fix is upstream. The 2 pc "rematch" apparatus is gone. build.ts recomputed every match after fetchExoplanets had already written the file — at a different tolerance, so the log reported a match count the data did not contain — and the offline entry point that persisted it had no caller. One matcher, one set of constants, used once. The archive cache is now keyed by a hash of the TAP query, so a response cached before the proper-motion columns cannot serve rows without them, where a missing cell would quietly read as "does not move"; the row's astrometry is stored with each planet, which is what made these tolerances measurable offline in the first place. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016jxMkwA2rbicdGxHosecYi |
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SenrokaiandClaude Fable 5
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dc2ce08694 |
Answer the review: direction settles distance, brightness is one-sided, and a lost id stops the scene
Three findings from the adversarial review of the merge, all reproduced. The distance test was hiding 1 489 stars that sit under an arcsecond from their Gaia entry with a Hipparcos parallax off by half — thirty of them at a false few parsecs from the Sun (HIP 82724 at 3.7 pc, where Gaia has it at 62.8) — and the first audit did not see them because it counted residual doubles through the same 50 % filter. Under three arcseconds the distances are now not consulted: a coincidence of direction that close is never chance at this depth (the quarter-degree shift finds none), and the parallax is the thing to fix. Brightness keeps its say at any separation, and is now one-sided: a folded entry may be five magnitudes fainter (a red dwarf in V against G) but not one brighter, because an entry a magnitude brighter than what is already at that spot is a primary Gaia does not carry — Almach, Alfirk and Ashlesha had all been folded into their companions' entries, 93 in all. The sky grid wraps at 0h. The Gaia query orders by source_id after G, so the row order — and the ids assigned from it — is a function of the archive's content rather than of the server's plan for 20 064 ties; the cache key is a hash of the query. And a bookmark to a star id the catalogue no longer holds — 56 000 Gaia ids change with this — sent the scene through reconcileSelection, enterSystem, its decline, finishTransition and reconcileSelection again until the stack overflowed. The selection is cleared instead, at the one place every path goes through. Regenerated: 423 641 stars, 57 512 HYG identities on Gaia positions, no HYG id or name lost, no star within 20 pc left with an unclaimed Gaia entry under an arcsecond. 403 HYG survivors still have an unclaimed Gaia entry within 60": 13 under an arcsecond, where the brightness guard does not trust HYG's magnitude, and the rest components 3" to 60" from their counterpart. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01QL6F9Bgfh8SgAiAAcPB9Hw |
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SenrokaiandClaude Fable 5
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08534279fb |
Bring Gaia to HYG's epoch before merging, and keep a star's name when it matches
Gaia DR3 gives positions for J2016.0, HYG for 2000.0, and the merge matched them on the sky to one arcsecond without propagating any proper motion. Sixteen years of motion is 62" for Proxima and 166" for Barnard's Star, so every star faster than ~62 mas/yr — most of the nearest ones — was kept twice, some 23 000 in all. The slow ones were matched, and lost: the merge kept Gaia's row whole, so 102 proper names, 1 336 Bayer/Flamsteed names and 32 000 spectral types became "Gaia DR3 <id>" and "Unknown", and 92 named exoplanet hosts handed their planets to their anonymous twin. Gaia is now asked for its proper motions and carried back to J2000 before it leaves the fetcher. HYG is placed from its own x/y/z columns, which are right where its `ra` is not: that column was carried from the Hipparcos epoch without the cos δ its motion needs, 17.9" off for Proxima. A match combines the two entries — Gaia's position, HYG's name, type, magnitude, colour and id — instead of choosing one. The tolerance is 15" with a five-magnitude guard, both set by measurement: 55 457 pairs sit under 1" once the epochs agree, the Gliese-only entries up to 12" (Ross 248), shifting every entry a quarter of a degree finds 16 chance neighbours at 15", and the guard keeps Sirius out of Sirius B's entry. Entries of one source are never merged with each other: the 1 411 Gaia doubles resolved under 1" are two stars, not one. Regenerated: 425 071 stars (was 447 410), 56 082 of them Gaia positions carrying HYG identities; no HYG id or name lost; the sixteen stars nearest the Sun carry no survey designation; 196 residual doubles, all components 17" or more from their counterpart. Five planets of four bright giants (7 CMa, HD 81688, omi UMa, xi Aql) lose their host link: their Gaia distance sits 0.7–1.1 pc from the archive's Hipparcos-based one, past the 0.5 pc the host match allows. Matching hosts on the sky rather than in space, as the merge does, is the follow-up. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01QL6F9Bgfh8SgAiAAcPB9Hw |
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Claude
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9a5e41495b |
Make a cold-cache ETL run a pure function of the archives
Two order dependencies surfaced while designing the scheduled refresh, both invisible on a developer machine with a warm cache and both guaranteed to haunt a weekly CI run that starts cold. The Exoplanet Archive query had no ORDER BY, so the archive was free to return rows in any order it liked — and exoplanets.json preserves row order, so a re-run could rewrite the file, and commit a diff, when nothing was actually published. Ordered by pl_name, which is unique among default_flag=1 rows, so the order is total. The deep-sky sort tie-broke with localeCompare, whose collation belongs to the ICU build of whichever Node runs the ETL. Compared code points instead: the file must not reorder because the runner's ICU disagrees with the machine that wrote it last. Both may reorder the committed files once, on the next real refresh. After that, byte-identity between runs means what it should: the archives published nothing. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01WaySiNst4HhDXBHnMy8p5G |
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Claude
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efa9e4084a |
Draw the whole catalogue, and build the aggregation the rest would need
Two things, one verified and one that cannot be. The render budget is now the whole catalogue: 68388 stars, one instanced draw call, which is what a GPU should be asked to do. The budget itself stays, because the catalogue is meant to grow past what any machine should draw at once — Gaia alone could contribute a million — and at that point the selection is what keeps the field legible rather than a grey wash. A `?stars=` override handles the machines that cannot, including the software rasterizer the end-to-end suite runs against, whose frame rate is two orders of magnitude below a real GPU's and which was measuring the rasterizer rather than the app. The aggregation is the second thing, and none of it has run. Every ESA, NOIRLab, SDSS and Euclid endpoint is unreachable from here — only GitHub raw is, which is why HYG and OpenNGC are the current sources. So this is infrastructure and a Gaia query written against the published DR3 schema, not data. What the framework encodes is that these surveys are not interchangeable. The distinction is not size but whether a catalogue knows how far away its objects are, because a 3D map cannot place a star it only has a direction for. Gaia is the only one of the five that can add stars here, because it is the only one that measures parallaxes. DECaPS2 has fifty times Gaia's object count and photometry alone — not one of its 3.32 billion objects can be placed in depth. Euclid's bulge is 8 kpc away, where a parallax is microarcseconds; its contribution would be imagery. SDSS-V and SAGA are keyed to stars something else already places, so they enrich rather than extend. Those roles are recorded as data the ETL prints, not as prose that can drift. Overlapping catalogues are reconciled on direction rather than on 3D proximity, which is the one non-obvious part. Two surveys agree on a star's direction to within an arcsecond and disagree on its distance by tens of per cent, so a star at 200 pc is 50 pc from itself between catalogues while being unmistakably the same object. Matching in 3D would need a tolerance so loose it swallowed real neighbours. The better parallax wins where both reach; where only one does, the star stays. Names become dense-with-holes with a source dictionary, because a survey catalogue has no proper names — writing "Gaia DR3 4472832130942575872" once per star would cost 25 MB per million to repeat what two adjacent fields already say. An empty entry costs three bytes and is regenerated on load. The Sun needed its own case in the merge: it sits at the origin, has no direction to compare, and appears in every catalogue. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01WaySiNst4HhDXBHnMy8p5G |
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Claude
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29fd92d118 |
Widen the star catalogue, and separate what is drawn from what is known
The map held 8750 stars within 50 pc and rendered 371 systems. Both were lower than they needed to be, for different reasons. The star catalogue was capped by its own encoding as much as by the cutoff: one JSON object per star, eight key names repeated each time, 157 bytes a star. At the range HYG actually reaches that is 17 MB to download and parse before the first frame. So the numbers move into two binary column stores — positions in stars.bin, which the GPU is handed verbatim, and id/magnitude/colour/spectral index in stars-meta.bin — and the JSON keeps only the strings, with 2600 distinct spectral classifications collapsed to a dictionary. The layout is defined once, in star-catalog.ts, and the ETL and the app both use it, so the writer and the reader cannot drift. The cutoff then goes to 250 pc: 68388 stars, 7.8x as many for 1.7x the bytes. That is where HYG's measurements stop rather than a round number — 98.6% of its rows are Hipparcos, whose parallaxes are good to about a milliarcsecond, so beyond 250 pc it would be plotting noise. Drawing all of them is a separate question from knowing them, and it is answered separately. The field draws a budget: every star inside 25 pc, because the nearest are faint red dwarfs and Proxima Centauri is magnitude 11, then the brightest of everything beyond. Search, navigation and the planet cross-reference still see the whole catalogue. A real GPU would draw all 68388 without noticing; the budget is for the machines that would not, and it is one constant. Systems were limited by something else entirely. The archive data already shipped named 4735 host stars and only 388 resolved, because the rest lay outside a 50 pc catalogue — and the cross-reference kept only its own result, so redoing it meant re-downloading an archive that is not reachable from here. Host coordinates are now stored with each planet, and the match is re-resolved at build time against whatever catalogue the run produced. Even name matching alone, which needs no coordinates and so works on the records already shipped, rescues 335 planets across 238 systems: 371 renderable systems become 609. Two selection rules were tuned for a 50 pc bubble and no longer fit. Tethers followed the Sun's nearest neighbours, which are a speck at this range, and now follow the brightest; labels were ranked by proximity, which named whatever sat nearest the middle of the screen, and are now ranked by brightness — so the view names Canopus, Achernar and Spica rather than a clump of catalogue designations. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01WaySiNst4HhDXBHnMy8p5G |
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Claude
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8d8c65bdb2 |
Propagate exoplanets with their real orbital period
Every exoplanet was propagated with gmForParent(undefined) — the Sun's gravitational parameter — so the whole catalogue orbited as though each host were exactly one solar mass. Most hosts are red dwarfs far lighter than that, and a heavier central mass pulls harder and shortens the period, so their planets were whirling round much too fast: TRAPPIST-1 is 0.09 solar masses, and its planets were completing an orbit in roughly a third of the true time. pl_orbper was already in the TAP query and was being discarded on the way into the record. It is now kept, along with st_mass. A period and a semi-major axis together pin the host's gravitational parameter exactly, via GM = n^2 a^3 — no stellar model, no assumption, just the inverse of the orbitalPeriodDays helper that was already there. resolveGravitationalParameter picks the best available source: the measured period, else the published host mass, else one solar mass as before. A derived value implying something outside 0.01-150 solar masses is rejected and falls through, since a period and axis taken from disagreeing solutions would otherwise send a planet spinning at a visibly absurd rate. Note the direction of the error, which is the opposite of what it looks like: assuming a *heavier* host than reality makes a planet orbit *faster*. A test pins it, and caught me stating it backwards first. The NASA Exoplanet Archive is unreachable from this environment (egress policy returns 403 on CONNECT), so exoplanets.json cannot be regenerated here and still carries no periods. Behaviour is therefore unchanged until `npm run etl` is run somewhere with archive access, at which point every planet with a published period starts moving correctly with no further code changes. build.ts reports how many records gained a period, and rejects non-positive ones. Tests: 171 passing, up from 151, including a new end-to-end check that TRAPPIST-1 b with its real period completes exactly one orbit in 1.51088 days and sits a full diameter away at half that. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01WaySiNst4HhDXBHnMy8p5G |
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Claude
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4aca223027 |
Regenerate the star catalogue, fixing 2331 names and 875 colours
Two ETL bugs, both fixed at the source and then re-run against HYG. Star ids,
ordering and positions are all unchanged, so stars.bin is byte-identical and
every exoplanet cross-reference still resolves.
Names. HYG's `gl` column already carries its own catalogue prefix ("Gl 581",
"GJ 3512"), unlike the bare numbers in `hd` and `hip`, so prefixing it again
produced 2331 of 8750 stars named "Gl GJ 1076". That corrupted three surfaces at
once: search, the on-screen labels, and exoplanet host-star name matching, which
compares normalised names and could never match "glgj1076" to "gj1076".
Colours. `Number(row['ci']) || 0` cannot tell a blank cell from a real zero, and
0 is a real B-V colour index meaning a hot blue-white A-type star. All 875
affected stars turned out to be blanks — the catalogue contains no genuine zero
inside the distance cutoff — so several hundred red dwarfs were rendering
blue-white. colorIndex is now `number | null` rather than defaulted, because any
numeric default is indistinguishable from a measurement.
Consumers resolve the gap from the spectral type instead. That needs real
parsing: HYG's `spect` column runs to 134 distinct spellings among the affected
stars alone, including a bare lowercase "m" for 354 of them, plus "k-m" ranges,
"dM4" luminosity prefixes and "K:" uncertainty flags. 622 of the 875 recover a
class this way — 497 of them M-class — and the remaining 253, which carry no
classification at all, fall back to neutral white.
The parse is anchored at the start of the string rather than scanning it. A scan
is the obvious implementation and is quietly wrong: the ETL writes the literal
"Unknown" for unclassified stars, that contains a K, and every one of those 253
would have been classified as an orange K-type. A test covers it.
Also lifts parseOptionalNumber out of fetchExoplanets into lib/csv, where both
fetchers now use it, and gives magnitude a faint default instead of 0 — no
current star is affected, but 0 would mean "as bright as Vega" and render an
unphotometered star as one of the largest points on the map.
Tests: 145 passing, up from 116, including the first coverage of
StarFieldRenderer. Build, both typechecks and the Playwright suite are green.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WaySiNst4HhDXBHnMy8p5G
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Claude
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06cf7d2a15 |
Fix four defects a user hits in the first minute
Found by surveying the codebase against the plan; each was verified against the
committed assets or the running app before being touched.
TRAPPIST-1 was orbiting the Sun. The Exoplanet Archive leaves sy_dist blank for
some systems, and fetchExoplanets.ts read it with bare Number() — Number('') is
0, which is finite, so it slipped past the Number.isFinite guard in
resolveHostStarId, placed the host at the origin, and matched Sol at distance
exactly 0. 127 records shipped with hostStarId 0, all seven TRAPPIST-1 planets
among them, and the system view filters on that id, so drilling into Sol drew
127 alien worlds inside the real solar system.
Fixed in three places: resolveHostStarId now rejects a non-positive distance
(the robust guard, covering every caller), fetchExoplanets.ts uses the
parseOptionalNumber that already sat unused in that same file for ra/dec/dist,
and validateExoplanets asserts nothing ever resolves to the Sun again — the Sun
has no exoplanets, so that tripwire costs nothing and is permanent.
The archive's endpoint is blocked by this environment's egress policy, so the
ETL cannot be re-run here. The committed asset was corrected in place instead,
which is safe because the outcome is deterministic: the name path runs first and
none of the 127 resolve by name, so all of them reached id 0 positionally and
the fixed pipeline yields null for exactly that set. Cross-referenced hosts drop
from 761 to 634; record count is unchanged.
Dragging to rotate selected stars. Selection was bound to the raw click event,
which browsers fire on release however far the pointer travelled and which
OrbitControls does not suppress — so any drag ending over a star launched a
camera flight, and in system view routed away to /body/:id. Now tracks
pointerdown and ignores a release more than 5 px from it.
Ghost systems accumulated on every star-to-star hop. SystemOrbitsRenderer.dispose
released geometries and materials but never detached its group, so old orbit
lines stayed parented forever — still traversed and re-uploaded each frame with
disposed geometries, drawn over the new system and unpickable. dispose() now
detaches and clears.
Galaxy star labels stayed pinned inside the system view. They are CSS2D objects
parented to the scene rather than to galaxyGroup, so hiding the group left up to
15 parsec-space names clumped over the system's star. Cleared on entry. Also
gated the per-frame Kepler propagation on actually being in a system; it ran in
galaxy view too, because the renderer is never nulled on exit.
Tests: 116 passing, up from 112. Build, both typechecks and the Playwright suite
are green.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WaySiNst4HhDXBHnMy8p5G
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Claude
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3a859360ba |
Add the deep-sky backdrop, the last unbuilt piece of the plan
The design doc scopes deep-sky objects as a galaxy-view backdrop and lists fetchDeepSky.ts, deepsky.json and deepsky.model.ts, but none of it existed — it was the only part of the plan with no implementation behind it. ETL: fetchDeepSky.ts pulls the OpenNGC catalog, classifies each object as a galaxy/nebula/cluster, and keeps the ~460 worth drawing (everything Messier, everything with a common name, and anything brighter than magnitude 9) out of ~12,000 mostly-anonymous rows. build.ts runs it and validates the output. Distances are the hard part: OpenNGC has no distance column, and both fallbacks fail for the best-known objects. M31, M33 and M42 are Local Group members whose redshift is negative or absent, and a galaxy's catalog parallax comes from a cross-matched foreground star — 6 mas for M31 would put a 780 kpc galaxy at 167 pc. So records store a unit direction on the celestial sphere rather than a position (the line of sight is always known precisely, and the objects are drawn on a fixed backdrop shell where true distance is unusable anyway), and distance is optional metadata carrying its own provenance. Parallax is trusted only for galactic objects, redshift only above z=0.003 where expansion outweighs peculiar velocity. 330 of 463 get a distance; the rest honestly report none. Rendering: DeepSkyRenderer paints the objects as soft additive billboards on a 2500 pc shell — clear of the 50 pc star field, beyond the camera's 2000 pc orbit limit, and inside its 5000 pc far plane. Size comes from real angular extent, so Andromeda is six times wider than the full Moon, clamped at both ends. Sprites rather than points because the WebGPU backend caps point primitives at one pixel; materials are shared per kind and brightness band, so 460 objects cost nine of them. The brightest dozen get permanent labels, which needed the label overlay to accept string ids alongside numeric star ids. The backdrop is decorative, so a failure to load its dataset is logged and the star field comes up regardless. Also documents the app in the README, which until now covered only the plugin marketplace. Tests: 112 passing, up from 54. Build, both typechecks and the Playwright suite are green. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01WaySiNst4HhDXBHnMy8p5G |
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Senrokai
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d7e8ea1d4d |
@
Add star-map Angular app, ETL pipeline, and caveman plugin Angular 3D star map (galaxy/system/body views, Three.js rendering, navigation store) plus the NASA ETL tooling that builds the star, exoplanet and solar-system datasets, Playwright e2e suite, and the cs:caveman Claude Code plugin (command, agent, skill). Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> @ |