Wrap Deimos in Stooke's Viking map, once its longitudes were settled on the body

Audit #40. deimos.jpg was a 592x592 disc photograph, 32.6% black sky, left in the folder
unlisted by 302fa96 because the one cylindrical map found then (USGS
wms_basemaps/Deimos/deimoscyl4.jpg) gave no way to tell which way its longitudes ran. It is now
Stooke's later map of the same set, from the NASA PDS Small Bodies Node
(MULTI-SA-MULTI-6-STOOKEMAPS-V3.0, deimos_cyl_viking_mro.jpg): Viking Orbiter images with MRO
HiRISE detail, 7200x3600 simple cylindrical, "0 longitude at the center".

The guide does not say which way longitude runs, and USGS georeferences its copy of the older
version with 0 at the left edge. Settled on the body: read with 0 in the middle and east to the
right, and drawn as a globe from outside, the hemisphere at 90 E matches unmirrored the sheet
Stooke titles "trailing side" (270 W), and the one at 90 W his "leading side". A synchronous
prograde moon trails at 90 E, so that reading holds; read the USGS way, the sheets would land on
the wrong hemispheres. A 1 km depression sits at Swift's Gazetteer position (12.5 N, 1.8 E).

Processed like the other maps (build_maps.py): no no-data pixels to grey (13 source pixels of 26
million at 0), area-downsampled to 1024x512, JPEG q85, 55 KB. Black pixels (under 8 of 255): 0%.
The map wraps seamlessly (mean 1.8 grey levels across the seam).

Measured in the running app (port 4311) through the IAU rotation and MAP_TO_BODY: Mars stands
over 0.18 W, 0.41 W and 0.20 W of the drawn map (latitudes within 0.04 deg) on 2000-01-01.5,
2025-01-01 and 2050-01-01, and Deimos heads toward 90.08 W, 90.30 W and 90.11 W: the hemisphere
that matched Stooke's leading sheet leads.

texture-catalog.spec.ts now lists Deimos among the mapped bodies. Mutant: the deimos line removed
from BODY_TEXTURE_PATHS; only 'wraps the moons and dwarf planets that have a mission mosaic in it'
failed (1 of 805). The textures README gives the source, credit, licence (the PDS archive states no
use restriction) and the longitude check; the root README counts twenty-eight photographed bodies.
The five Uranian moons stay derived: USGS has only Voyager control networks for them, no mosaic.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/assets/textures/README.md

@@ -41,6 +41,7 @@ processing; the disc photographs dropped in PR #33 were 20-43% black sky.
 | Map | Source | Mission, credit | Checked against | Unmapped (grey) | Black | Size |
 | --- | --- | --- | --- | --- | --- | --- |
 | `phobos.jpg` | [USGS](https://asc-pds-services.s3.us-west-2.amazonaws.com/mosaic/Phobos_Viking_Mosaic_40ppd_DLRcontrol.tif) Phobos Viking Mosaic 40ppd (DLR controlled) | Viking Orbiter, with Mars Express images; P. Stooke after Simonelli et al. 1993, PDS Stooke Small Bodies Maps | Stickney (1 N, 49 W) | 0.03% | 0.008% | 1024x512, 119 KB |
+| `deimos.jpg` | [PDS SBN](https://sbnarchive.psi.edu/pds3/multi_mission/MULTI_SA_MULTI_6_STOOKEMAPS_V3_0/document/m2deimos/deimos_cyl_viking_mro.jpg) Stooke Small Bodies Maps V3.0, Deimos simple cylindrical mosaic, 20 px/deg | Viking Orbiter, with MRO HiRISE; P. Stooke and colleagues, control after P. Thomas (Cornell) | Swift (12.5 N, 1.8 E); the set's leading and trailing sheets (see below) | 0% | 0% | 1024x512, 55 KB |
 | `io.jpg` | [USGS](https://asc-pds-services.s3.us-west-2.amazonaws.com/mosaic/Io_GalileoSSI-Voyager_Global_Mosaic_ClrMerge_1km.tif) Io Galileo SSI-Voyager Global Mosaic, colour merge, 1 km | Galileo SSI and Voyager; USGS Astrogeology | Pele, Loki, Prometheus | 0.02% | 0% | 2048x1024, 283 KB |
 | `europa.jpg` | [USGS](https://asc-pds-services.s3.us-west-2.amazonaws.com/mosaic/Europa_Voyager_GalileoSSI_global_mosaic_500m.tif) Europa Voyager-Galileo SSI Global Mosaic 500 m | Voyager and Galileo SSI; Archinal et al., USGS | Pwyll (25 S, 271 W) | 4.33% (polar gaps) | 0% | 2048x1024, 386 KB |
 | `ganymede.jpg` | [USGS](https://asc-pds-services.s3.us-west-2.amazonaws.com/mosaic/Ganymede_Voyager_GalileoSSI_Global_ClrMosaic_1435m.tif) Ganymede Voyager-Galileo SSI Colour Global Mosaic 1.4 km | Voyager and Galileo SSI; USGS | Osiris, Tros, Galileo Regio | 3.63% (polar gaps) | 0% | 2048x1024, 363 KB |
@@ -66,7 +67,19 @@ filters, which USGS says the eye would see "similar but much more muted"; Ganyme
 Galileo and Voyager colour mosaic; Triton's is orange, violet and ultraviolet shown as red, green
 and blue (Smith et al. 1989). Phoebe is irregular (a 106.6 km sphere here), and its map keeps the
 deep shadows of a single flyby. Phobos's source notes that where images lit
-from opposite sides meet, the seam was blended for appearance, not geometry.
+from opposite sides meet, the seam was blended for appearance, not geometry. Deimos's map is from
+the NASA PDS Small Bodies Node archive (MULTI-SA-MULTI-6-STOOKEMAPS-V3.0), which states no use
+restriction; the credit column cites its author.
+
+Deimos's map says only "0 longitude at the center", not which way longitude runs, and USGS's own
+copy of the older version (`wms_basemaps/Deimos/deimoscyl4.jgw`) is georeferenced with longitude 0
+at its left edge instead. Its frame was settled on the body. Read with longitude 0 in the middle
+and east to the right, and drawn as a globe seen from outside, north up, the hemisphere centred at
+90 E matches, unmirrored, the sheet of the same set that Stooke titles "trailing side" and numbers
+270 (270 W), and the one centred at 90 W matches his "leading side" at 90. A synchronous prograde
+moon trails at 90 E and leads at 90 W, so that reading is the right one; read the USGS way, the
+two sheets would land on the wrong hemispheres. A 1 km depression lies at Swift's Gazetteer
+position (12.5 N, 1.8 E), near the middle; Voltaire (22 N, 3.5 W, 1.9 km) could not be picked out.
 
 Longitudes follow each body's IAU prime meridian, which the checks above confirm on the maps. For
 Pluto and Charon that is the right-hand-rule pole of the WGCCRE 2015 report, which New Horizons'
@@ -75,10 +88,6 @@ the far side, near 180.
 
 ## Left out
 
-- **Deimos.** `deimos.jpg` is a square disc photograph (32.6% black sky), not a map, and is not
-  listed. The only cylindrical map found, `wms_basemaps/Deimos/deimoscyl4.jpg` (Stooke, Viking), has
-  no label giving its longitude direction, and neither Voltaire nor Swift, the craters near its
-  prime meridian, could be found on it to settle it.
 - **Miranda, Ariel, Umbriel, Titania, Oberon.** Voyager 2 saw only their southern hemispheres,
   and no public-domain map of them exists at USGS or the PDS. The best maps (P. Schenk 2020, USRA
   repository, hdl.handle.net/20.500.11753/1687) carry no licence.