{
  "system_id": "GJ 3820",
  "proper_name": "Uusi Vantaa",
  "star_type": "K",
  "spectral_class": "K2 :",
  "wiki_data": {
    "habitable_count": 1,
    "inhabited_count": 1,
    "has_gas_giant": true,
    "has_asteroid_belt": true,
    "has_horizon_station": true,
    "raw_bodies_line": null
  },
  "bodies": [
    {"body_id": "GJ3820b", "proper_name": null, "body_type": "planet", "orbit_index": 1, "parent_body_id": null, "inhabited": false, "population": 0, "mass_class": "terrestrial", "surface_gravity": 0.32, "orbital_period_days": 18, "rotation_period_hours": 432, "atmosphere": "none", "biome_summary": "barren", "hydrosphere": "none", "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "inner rocky, tidally locked"},
    {"body_id": "GJ3820c", "proper_name": null, "body_type": "planet", "orbit_index": 2, "parent_body_id": null, "inhabited": false, "population": 0, "mass_class": "terrestrial", "surface_gravity": 0.45, "orbital_period_days": 50, "rotation_period_hours": 20.0, "atmosphere": "thin", "biome_summary": "arid", "hydrosphere": "none", "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "hot rocky"},
    {"body_id": "GJ3820d", "proper_name": "Sotkamo", "body_type": "planet", "orbit_index": 3, "parent_body_id": null, "inhabited": true, "population": 900, "mass_class": "terrestrial", "surface_gravity": 0.85, "orbital_period_days": 120, "rotation_period_hours": 22.0, "atmosphere": "breathable", "biome_summary": "arid", "hydrosphere": "minimal", "economic_role": "extraction", "settlement_pattern": "concentrated", "industrial_corridor": null, "notes": "primary inhabited world, dry amber-lit landscape, shallow endorheic basins with mineral-rich aquifers, salt flats, hazy mineral dust atmosphere, precision metallurgy, Järvinen Works rare-earth alloy components, Wave 2 Finnish daughter colony from Koskinen's Reach"},
    {"body_id": "GJ3820e", "proper_name": null, "body_type": "planet", "orbit_index": 4, "parent_body_id": null, "inhabited": false, "population": 0, "mass_class": "terrestrial", "surface_gravity": 0.40, "orbital_period_days": 260, "rotation_period_hours": 18.0, "atmosphere": "thin", "biome_summary": "arid", "hydrosphere": "none", "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "cold rocky, outer habitable zone edge"},
    {"body_id": "GJ3820f", "proper_name": null, "body_type": "planet", "orbit_index": 5, "parent_body_id": null, "inhabited": false, "population": 0, "mass_class": "terrestrial", "surface_gravity": 0.32, "orbital_period_days": 600, "rotation_period_hours": 16.0, "atmosphere": "none", "biome_summary": "frozen", "hydrosphere": "ice", "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "frozen rocky"},
    {"body_id": "GJ3820g", "proper_name": null, "body_type": "gas_giant", "orbit_index": 6, "parent_body_id": null, "inhabited": false, "population": 0, "mass_class": "gas_giant", "surface_gravity": null, "orbital_period_days": 1600, "rotation_period_hours": 11.0, "atmosphere": "dense", "biome_summary": null, "hydrosphere": null, "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "moderate gas giant"},
    {"body_id": "GJ3820g-1", "proper_name": null, "body_type": "moon", "orbit_index": 1, "parent_body_id": "GJ3820g", "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": "GJ3820g-2", "proper_name": null, "body_type": "moon", "orbit_index": 2, "parent_body_id": "GJ3820g", "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": "GJ3820h", "proper_name": null, "body_type": "planet", "orbit_index": 7, "parent_body_id": null, "inhabited": false, "population": 0, "mass_class": "terrestrial", "surface_gravity": 0.22, "orbital_period_days": 4200, "rotation_period_hours": 20.0, "atmosphere": "none", "biome_summary": "frozen", "hydrosphere": "ice", "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "outer ice world"},
    {"body_id": "GJ3820i", "proper_name": null, "body_type": "planet", "orbit_index": 8, "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": "GJ3820-belt", "proper_name": null, "body_type": "asteroid_belt", "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": "outer belt"},
    {"body_id": "GJ3820-oort", "proper_name": null, "body_type": "oort_cloud", "orbit_index": 10, "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": "GJ3820d-S1", "proper_name": "Vuolijoki", "orbits_body_id": "GJ3820d", "station_type": "industrial", "population": 0, "economic_role": "extraction", "docking_class": "restricted", "has_gate_infrastructure": false, "notes": "Järvinen Works orbital processing, alloy component export staging, Basin Council logistics"},
    {"station_id": "GJ3820-oort-S1", "proper_name": "Puolanka", "orbits_body_id": "GJ3820-oort", "station_type": "horizon", "population": 0, "economic_role": "transit", "docking_class": "standard", "has_gate_infrastructure": true, "notes": "horizon station, 1 aperture, single-gate connection to Koskinen's Reach"}
  ]
}