{
  "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"
    }
  ]
}