011ebe1356773689181e437ac7a752d70fcd65d3
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Commits
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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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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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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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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> @ |