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settled-reach/docs/atlas/proposals/GJ876.json
T
jpmschweitzerandClaude Opus 4.6 0975fe2afe data(atlas): author Lacaille (GJ 825) + Koskinen's Reach (GJ 876)
Lacaille: Arbroath, Méchain
Koskinen's Reach: Kuhmo, Halti

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-03-25 17:20:05 +01:00

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{
"system_id": "GJ 876",
"proper_name": "Koskinen's Reach",
"star_type": "binary",
"spectral_class": "M5",
"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": "GJ876b", "proper_name": null, "body_type": "planet", "orbit_index": 1, "parent_body_id": null, "inhabited": false, "population": 0, "mass_class": "terrestrial", "surface_gravity": 0.28, "orbital_period_days": 3, "rotation_period_hours": 72, "atmosphere": "none", "biome_summary": "barren", "hydrosphere": "none", "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "inner scorched, tidally locked"},
{"body_id": "GJ876c", "proper_name": null, "body_type": "planet", "orbit_index": 2, "parent_body_id": null, "inhabited": false, "population": 0, "mass_class": "terrestrial", "surface_gravity": 0.52, "orbital_period_days": 10, "rotation_period_hours": 240, "atmosphere": "none", "biome_summary": "barren", "hydrosphere": "none", "economic_role": "extraction", "settlement_pattern": null, "industrial_corridor": null, "notes": "resource-rich inner rocky, gravitationally concentrated mineral deposits from binary dynamics, primary extraction target, station anchor"},
{"body_id": "GJ876d", "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": 28, "rotation_period_hours": 672, "atmosphere": "thin", "biome_summary": "frozen", "hydrosphere": "ice", "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "cold rocky"},
{"body_id": "GJ876e", "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": 80, "rotation_period_hours": 1920, "atmosphere": "none", "biome_summary": "frozen", "hydrosphere": "ice", "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "frozen rocky"},
{"body_id": "GJ876f", "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": 400, "rotation_period_hours": 10.0, "atmosphere": "dense", "biome_summary": null, "hydrosphere": null, "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "moderate gas giant, binary dynamics affect outer orbit stability"},
{"body_id": "GJ876f-1", "proper_name": null, "body_type": "moon", "orbit_index": 1, "parent_body_id": "GJ876f", "inhabited": false, "population": 0, "mass_class": "dwarf", "surface_gravity": 0.05, "orbital_period_days": 5, "rotation_period_hours": 120, "atmosphere": "none", "biome_summary": "barren", "hydrosphere": "none", "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "inner gas giant moon"},
{"body_id": "GJ876f-2", "proper_name": null, "body_type": "moon", "orbit_index": 2, "parent_body_id": "GJ876f", "inhabited": false, "population": 0, "mass_class": "dwarf", "surface_gravity": 0.03, "orbital_period_days": 12, "rotation_period_hours": 288, "atmosphere": "none", "biome_summary": "frozen", "hydrosphere": "ice", "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "icy outer gas giant moon"},
{"body_id": "GJ876g", "proper_name": null, "body_type": "planet", "orbit_index": 6, "parent_body_id": null, "inhabited": false, "population": 0, "mass_class": "terrestrial", "surface_gravity": 0.20, "orbital_period_days": 1400, "rotation_period_hours": 18.0, "atmosphere": "none", "biome_summary": "frozen", "hydrosphere": "ice", "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "outer ice world, binary orbital perturbations"},
{"body_id": "GJ876h", "proper_name": null, "body_type": "planet", "orbit_index": 7, "parent_body_id": null, "inhabited": false, "population": 0, "mass_class": "dwarf", "surface_gravity": 0.10, "orbital_period_days": 3200, "rotation_period_hours": 20.0, "atmosphere": "none", "biome_summary": "frozen", "hydrosphere": "ice", "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "distant ice dwarf, binary perturbations"},
{"body_id": "GJ876-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": "sparse belt, binary dynamics shape distribution"},
{"body_id": "GJ876-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": "GJ876c-S1", "proper_name": "Kuhmo", "orbits_body_id": "GJ876c", "station_type": "industrial", "population": 25000000, "economic_role": "extraction", "docking_class": "standard", "has_gate_infrastructure": false, "notes": "community settlement and extraction station, Finnish-heritage founding, Koskinen Community Council, sustainable-equilibrium mining, high local self-sufficiency"},
{"station_id": "GJ876-oort-S1", "proper_name": "Halti", "orbits_body_id": "GJ876-oort", "station_type": "horizon", "population": 0, "economic_role": "transit", "docking_class": "major", "has_gate_infrastructure": true, "notes": "horizon station, 2 apertures, 17-year periapsis cycle affects navigational reference systems"}
]
}