be5f8ad544
- source 8 public-domain equirectangular mosaics (io/europa/ganymede/callisto/ titan/triton/charon/phobos) from usgs astrogeology, downscale to 1024x512 jpg (0.92 mb added total, each <=143 kb); credits.md lists source/mission/license - bodies.js: texture field on the 8 sourced moon entries only - moons.js: load textures via ctx.loadTextureInto (same path as planets.js, so the moon's own 2k map also renders now); flat-color 404 fallback preserved - moons.js tick: tidal lock rotation.y = 2pi*(jd-J2000)/period + pi (signed period gives retrograde spin for free)
128 lines
7.0 KiB
JavaScript
128 lines
7.0 KiB
JavaScript
// SOLARGOD physical-data registry — radii, axial tilts, rotation, colors, texture
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// paths, moon orbits. Radii are the brief §8 values (JPL). Tilts/rotation are
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// canonical IAU/JPL phys_par values; every textured body has a flat-color
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// procedural fallback so a missing texture degrades gracefully (brief §7).
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//
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// Fields: name, type, radiusKm, axialTiltDeg, rotationHours (neg = retrograde),
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// color (fallback), texture (under CONFIG.textures.path, or null), parent,
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// ephemId (planet → ephem.js key) | moonOrbit {aKm, periodDays (neg = retro)} |
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// elements (small-body epoch elements). rings when present.
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export const BODIES = {
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sun: {
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name: 'Sun', type: 'star', radiusKm: 695700, axialTiltDeg: 7.25,
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rotationHours: 609.12, color: '#ffdd88', texture: '2k_sun.jpg', parent: null,
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},
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mercury: {
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name: 'Mercury', type: 'planet', radiusKm: 2439.7, axialTiltDeg: 0.034,
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rotationHours: 1407.6, color: '#9c8b7a', texture: '2k_mercury.jpg',
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parent: 'sun', ephemId: 'mercury',
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},
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venus: {
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name: 'Venus', type: 'planet', radiusKm: 6051.8, axialTiltDeg: 177.36,
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rotationHours: -5832.5, color: '#d9b382', texture: '2k_venus_surface.jpg',
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parent: 'sun', ephemId: 'venus',
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},
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earth: {
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name: 'Earth', type: 'planet', radiusKm: 6371.0, axialTiltDeg: 23.44,
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rotationHours: 23.9345, color: '#4b7bd4', texture: '2k_earth_daymap.jpg',
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parent: 'sun', ephemId: 'earth',
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},
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mars: {
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name: 'Mars', type: 'planet', radiusKm: 3389.5, axialTiltDeg: 25.19,
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rotationHours: 24.6229, color: '#c1440e', texture: '2k_mars.jpg',
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parent: 'sun', ephemId: 'mars',
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},
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jupiter: {
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name: 'Jupiter', type: 'planet', radiusKm: 69911, axialTiltDeg: 3.13,
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rotationHours: 9.925, color: '#d8ca9d', texture: '2k_jupiter.jpg',
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parent: 'sun', ephemId: 'jupiter',
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},
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saturn: {
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name: 'Saturn', type: 'planet', radiusKm: 58232, axialTiltDeg: 26.73,
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rotationHours: 10.656, color: '#e3d9b0', texture: '2k_saturn.jpg',
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parent: 'sun', ephemId: 'saturn',
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rings: { innerKm: 74500, outerKm: 140220, texture: '2k_saturn_ring_alpha.png' },
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},
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uranus: {
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name: 'Uranus', type: 'planet', radiusKm: 25362, axialTiltDeg: 97.77,
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rotationHours: -17.24, color: '#b2e5e8', texture: '2k_uranus.jpg',
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parent: 'sun', ephemId: 'uranus',
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rings: { innerKm: 41000, outerKm: 51000, texture: null, color: '#8fa3a8' },
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},
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neptune: {
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name: 'Neptune', type: 'planet', radiusKm: 24622, axialTiltDeg: 28.32,
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rotationHours: 16.11, color: '#3f66d9', texture: '2k_neptune.jpg',
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parent: 'sun', ephemId: 'neptune',
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},
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// ---- moons (circular orbits in parent's equatorial plane; a[km], period[d]) ----
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moon: { name: 'Moon', type: 'moon', radiusKm: 1737.4, axialTiltDeg: 6.68,
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rotationHours: 655.728, color: '#bcbcbc', texture: '2k_moon.jpg',
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parent: 'earth', moonOrbit: { aKm: 384400, periodDays: 27.322 } },
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phobos: { name: 'Phobos', type: 'moon', radiusKm: 11.27, color: '#8a7c6e',
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texture: '1k_phobos.jpg', parent: 'mars', moonOrbit: { aKm: 9378, periodDays: 0.319 } },
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deimos: { name: 'Deimos', type: 'moon', radiusKm: 6.2, color: '#9a8c7a',
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texture: null, parent: 'mars', moonOrbit: { aKm: 23459, periodDays: 1.262 } },
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io: { name: 'Io', type: 'moon', radiusKm: 1821.6, color: '#e8d24b',
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texture: '1k_io.jpg', parent: 'jupiter', moonOrbit: { aKm: 421700, periodDays: 1.769 } },
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europa: { name: 'Europa', type: 'moon', radiusKm: 1560.8, color: '#c9b79c',
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texture: '1k_europa.jpg', parent: 'jupiter', moonOrbit: { aKm: 671034, periodDays: 3.551 } },
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ganymede: { name: 'Ganymede', type: 'moon', radiusKm: 2634.1, color: '#9b8e7e',
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texture: '1k_ganymede.jpg', parent: 'jupiter', moonOrbit: { aKm: 1070412, periodDays: 7.155 } },
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callisto: { name: 'Callisto', type: 'moon', radiusKm: 2410.3, color: '#6b5f52',
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texture: '1k_callisto.jpg', parent: 'jupiter', moonOrbit: { aKm: 1882709, periodDays: 16.689 } },
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mimas: { name: 'Mimas', type: 'moon', radiusKm: 198.2, color: '#c8c8c8',
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texture: null, parent: 'saturn', moonOrbit: { aKm: 185539, periodDays: 0.942 } },
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enceladus: { name: 'Enceladus', type: 'moon', radiusKm: 252.1, color: '#f0f0f0',
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texture: null, parent: 'saturn', moonOrbit: { aKm: 238042, periodDays: 1.370 } },
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tethys: { name: 'Tethys', type: 'moon', radiusKm: 531.1, color: '#d6d6d6',
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texture: null, parent: 'saturn', moonOrbit: { aKm: 294672, periodDays: 1.888 } },
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dione: { name: 'Dione', type: 'moon', radiusKm: 561.4, color: '#cfcfcf',
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texture: null, parent: 'saturn', moonOrbit: { aKm: 377415, periodDays: 2.737 } },
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rhea: { name: 'Rhea', type: 'moon', radiusKm: 763.8, color: '#c4c4c4',
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texture: null, parent: 'saturn', moonOrbit: { aKm: 527068, periodDays: 4.518 } },
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titan: { name: 'Titan', type: 'moon', radiusKm: 2574.7, color: '#d9a441',
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texture: '1k_titan.jpg', parent: 'saturn', moonOrbit: { aKm: 1221870, periodDays: 15.945 } },
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iapetus: { name: 'Iapetus', type: 'moon', radiusKm: 734.5, color: '#8a7a5e',
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texture: null, parent: 'saturn', moonOrbit: { aKm: 3560851, periodDays: 79.33 } },
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miranda: { name: 'Miranda', type: 'moon', radiusKm: 235.8, color: '#b8bcc0',
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texture: null, parent: 'uranus', moonOrbit: { aKm: 129900, periodDays: 1.413 } },
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ariel: { name: 'Ariel', type: 'moon', radiusKm: 578.9, color: '#c6cacd',
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texture: null, parent: 'uranus', moonOrbit: { aKm: 190900, periodDays: 2.520 } },
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umbriel: { name: 'Umbriel', type: 'moon', radiusKm: 584.7, color: '#7f8488',
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texture: null, parent: 'uranus', moonOrbit: { aKm: 266000, periodDays: 4.144 } },
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titania: { name: 'Titania', type: 'moon', radiusKm: 788.4, color: '#b0b4b8',
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texture: null, parent: 'uranus', moonOrbit: { aKm: 436300, periodDays: 8.706 } },
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oberon: { name: 'Oberon', type: 'moon', radiusKm: 761.4, color: '#9aa0a4',
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texture: null, parent: 'uranus', moonOrbit: { aKm: 583500, periodDays: 13.46 } },
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// Triton is retrograde — encoded via the negative-period convention (brief §8).
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triton: { name: 'Triton', type: 'moon', radiusKm: 1353.4, color: '#d6cfc4',
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texture: '1k_triton.jpg', parent: 'neptune', moonOrbit: { aKm: 354759, periodDays: -5.877 } },
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// ---- Pluto system (small-body epoch elements; texture-less spheres) ----
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pluto: {
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name: 'Pluto', type: 'dwarf', radiusKm: 1188.3, axialTiltDeg: 122.53,
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rotationHours: -153.2928, color: '#d9c8a9', texture: null, parent: 'sun',
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// JPL SBDB J2000 osculating elements (epoch 2451545.0 TDB).
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elements: { a: 39.48168677, e: 0.24880766, i: 17.14175, om: 110.30347,
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w: 113.76329, ma: 14.86012204, epoch: 2451545.0 },
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},
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charon: { name: 'Charon', type: 'moon', radiusKm: 606.0, color: '#b3a894',
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texture: '1k_charon.jpg', parent: 'pluto', moonOrbit: { aKm: 19591, periodDays: 6.387 } },
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};
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// Ordered planet ids (draw / menu order).
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export const PLANET_ORDER = ['mercury', 'venus', 'earth', 'mars', 'jupiter', 'saturn', 'uranus', 'neptune'];
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// Moons grouped by parent.
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export function moonsOf(parentId) {
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return Object.entries(BODIES)
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.filter(([, b]) => b.type === 'moon' && b.parent === parentId)
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.map(([id]) => id);
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}
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