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settled-reach/docs/atlas/proposals/GJ3991.json
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jpmschweitzerandClaude Opus 4.6 4b68cb455e fix(atlas): address PR #100 review — star_type audit, data quality fixes 
- Fix star_type/spectral_class mismatches across 36 proposals
- Differentiate GJ1002 copy-paste planets (c-g had identical params)
- Fix GJ880 malformed spectral_class (M2: → M2V) and Leirvik station pop
- Fix GJ3325 malformed spectral_class (K: → K)
- Correct white dwarf star_type (GJ1221, GJ3991 → D)
- Correct "unusual" star_type (GJ3877, GJ661A → K)
- Delete tooling/atlas-helpers.sh (superseded by clean scripts on main)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-03-26 08:16:18 +01:00

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{
"system_id": "GJ 3991",
"proper_name": "Dunbar",
"star_type": "D",
"spectral_class": "DA",
"wiki_data": {
"habitable_count": 0,
"inhabited_count": 0,
"has_gas_giant": true,
"has_asteroid_belt": true,
"has_horizon_station": true,
"raw_bodies_line": null
},
"bodies": [
{
"body_id": "GJ3991b",
"proper_name": null,
"body_type": "planet",
"orbit_index": 1,
"parent_body_id": null,
"inhabited": false,
"population": 0,
"mass_class": "terrestrial",
"surface_gravity": 0.3,
"orbital_period_days": 40,
"rotation_period_hours": 18.0,
"atmosphere": "none",
"biome_summary": "barren",
"hydrosphere": "none",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "inner rocky remnant, widened orbit from stellar mass loss during AGB phase"
},
{
"body_id": "GJ3991c",
"proper_name": null,
"body_type": "planet",
"orbit_index": 2,
"parent_body_id": null,
"inhabited": false,
"population": 0,
"mass_class": "terrestrial",
"surface_gravity": 0.42,
"orbital_period_days": 120,
"rotation_period_hours": 20.0,
"atmosphere": "none",
"biome_summary": "barren",
"hydrosphere": "none",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "rocky remnant, no atmosphere retained after red giant phase"
},
{
"body_id": "GJ3991d",
"proper_name": null,
"body_type": "planet",
"orbit_index": 3,
"parent_body_id": null,
"inhabited": false,
"population": 0,
"mass_class": "terrestrial",
"surface_gravity": 0.35,
"orbital_period_days": 350,
"rotation_period_hours": 16.0,
"atmosphere": "none",
"biome_summary": "frozen",
"hydrosphere": "ice",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "cold rocky remnant"
},
{
"body_id": "GJ3991e",
"proper_name": null,
"body_type": "planet",
"orbit_index": 4,
"parent_body_id": null,
"inhabited": false,
"population": 0,
"mass_class": "terrestrial",
"surface_gravity": 0.28,
"orbital_period_days": 900,
"rotation_period_hours": 15.0,
"atmosphere": "none",
"biome_summary": "frozen",
"hydrosphere": "ice",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "frozen rocky"
},
{
"body_id": "GJ3991f",
"proper_name": null,
"body_type": "gas_giant",
"orbit_index": 5,
"parent_body_id": null,
"inhabited": false,
"population": 0,
"mass_class": "gas_giant",
"surface_gravity": null,
"orbital_period_days": 3500,
"rotation_period_hours": 12.0,
"atmosphere": "dense",
"biome_summary": null,
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "distant gas giant, survived AGB mass loss in outer orbit"
},
{
"body_id": "GJ3991f-1",
"proper_name": null,
"body_type": "moon",
"orbit_index": 1,
"parent_body_id": "GJ3991f",
"inhabited": false,
"population": 0,
"mass_class": "dwarf",
"surface_gravity": 0.05,
"orbital_period_days": 6,
"rotation_period_hours": 144,
"atmosphere": "none",
"biome_summary": "frozen",
"hydrosphere": "ice",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "gas giant moon"
},
{
"body_id": "GJ3991g",
"proper_name": null,
"body_type": "planet",
"orbit_index": 6,
"parent_body_id": null,
"inhabited": false,
"population": 0,
"mass_class": "dwarf",
"surface_gravity": 0.11,
"orbital_period_days": 8000,
"rotation_period_hours": 22.0,
"atmosphere": "none",
"biome_summary": "frozen",
"hydrosphere": "ice",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "distant ice dwarf"
},
{
"body_id": "GJ3991h",
"proper_name": null,
"body_type": "planet",
"orbit_index": 7,
"parent_body_id": null,
"inhabited": false,
"population": 0,
"mass_class": "dwarf",
"surface_gravity": 0.08,
"orbital_period_days": 15000,
"rotation_period_hours": 24.0,
"atmosphere": "none",
"biome_summary": "frozen",
"hydrosphere": "ice",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "distant ice dwarf remnant"
},
{
"body_id": "GJ3991-belt",
"proper_name": null,
"body_type": "asteroid_belt",
"orbit_index": 8,
"parent_body_id": null,
"inhabited": false,
"population": 0,
"mass_class": null,
"surface_gravity": null,
"orbital_period_days": null,
"rotation_period_hours": null,
"atmosphere": null,
"biome_summary": null,
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "debris belt, remnant of disrupted inner system during AGB phase"
},
{
"body_id": "GJ3991-oort",
"proper_name": null,
"body_type": "oort_cloud",
"orbit_index": 9,
"parent_body_id": null,
"inhabited": false,
"population": 0,
"mass_class": null,
"surface_gravity": null,
"orbital_period_days": null,
"rotation_period_hours": null,
"atmosphere": null,
"biome_summary": null,
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "oort cloud"
}
],
"stations": [
{
"station_id": "GJ3991b-S1",
"proper_name": "Haddington",
"orbits_body_id": "GJ3991b",
"station_type": "commercial",
"population": 100000000,
"economic_role": "transit",
"docking_class": "major",
"has_gate_infrastructure": false,
"notes": "Dunbar Station, fully artificial pressurized habitat, Dunbar Station Council, Assembly liaison office, orbital hydroponics rings, transit services, Scottish-heritage community, wave_3 loop node"
},
{
"station_id": "GJ3991-oort-S1",
"proper_name": "Burnmouth",
"orbits_body_id": "GJ3991-oort",
"station_type": "horizon",
"population": 1000,
"economic_role": "transit",
"docking_class": "major",
"has_gate_infrastructure": true,
"notes": "horizon station, 2 apertures, outer loop transit toward GJ 3325 in variable condition"
}
]
}
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