{
  "system_id": "GJ 1",
  "proper_name": "Grünfeld",
  "star_type": "M",
  "spectral_class": "M2V",
  "wiki_data": {
    "habitable_count": 1,
    "inhabited_count": 2,
    "has_gas_giant": true,
    "has_asteroid_belt": true,
    "has_horizon_station": true,
    "raw_bodies_line": null
  },
  "bodies": [
    {
      "body_id": "GJ1b",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 1,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "terrestrial",
      "surface_gravity": 0.33,
      "orbital_period_days": 7.8,
      "rotation_period_hours": 187.2,
      "atmosphere": "none",
      "biome_summary": "barren",
      "hydrosphere": null,
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "inner scorched rocky, tidally locked"
    },
    {
      "body_id": "GJ1c",
      "proper_name": "Feldmark",
      "body_type": "planet",
      "orbit_index": 2,
      "parent_body_id": null,
      "inhabited": true,
      "population": 12000000,
      "mass_class": "terrestrial",
      "surface_gravity": 0.82,
      "orbital_period_days": 65.0,
      "rotation_period_hours": 1560.0,
      "atmosphere": "standard",
      "biome_summary": "temperate_terminator",
      "hydrosphere": "liquid_water",
      "economic_role": "agricultural",
      "settlement_pattern": "dispersed",
      "industrial_corridor": "agricultural_export",
      "notes": "primary inhabited world; tidally locked; wave_4 German aspirational naming; 2-aperture loop_member; amended soil supports modified root vegetables, low-light grain, fungi; agricultural cooperative governance; mushroom and specialty root exports"
    },
    {
      "body_id": "GJ1-belt",
      "proper_name": null,
      "body_type": "asteroid_belt",
      "orbit_index": 3,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "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 asteroid belt"
    },
    {
      "body_id": "GJ1d",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 4,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "terrestrial",
      "surface_gravity": 0.48,
      "orbital_period_days": 240.0,
      "rotation_period_hours": 22.4,
      "atmosphere": "thin",
      "biome_summary": "frozen",
      "hydrosphere": null,
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "outer rocky, cold, uninhabited"
    },
    {
      "body_id": "GJ1e",
      "proper_name": null,
      "body_type": "gas_giant",
      "orbit_index": 5,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": null,
      "surface_gravity": null,
      "orbital_period_days": 680.0,
      "rotation_period_hours": 12.6,
      "atmosphere": "gas_giant",
      "biome_summary": null,
      "hydrosphere": null,
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "outer gas giant, one moon"
    },
    {
      "body_id": "GJ1e-m1",
      "proper_name": "Klause",
      "body_type": "moon",
      "orbit_index": 1,
      "parent_body_id": "GJ1e",
      "inhabited": true,
      "population": 1200,
      "mass_class": "dwarf",
      "surface_gravity": 0.14,
      "orbital_period_days": 5.4,
      "rotation_period_hours": 129.6,
      "atmosphere": "thin",
      "biome_summary": "cold_arid",
      "hydrosphere": "subsurface_liquid",
      "economic_role": "agricultural",
      "settlement_pattern": "dispersed",
      "industrial_corridor": null,
      "notes": "inhabited rural moon; tidally locked to parent gas giant; small fungi-growing outpost using subsurface geothermal warmth; cooperative-affiliated"
    },
    {
      "body_id": "GJ1f",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 6,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "terrestrial",
      "surface_gravity": 0.37,
      "orbital_period_days": 1800.0,
      "rotation_period_hours": 31.4,
      "atmosphere": "trace",
      "biome_summary": "frozen",
      "hydrosphere": "ice",
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "outer icy rocky, uninhabited"
    },
    {
      "body_id": "GJ1g",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 7,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "terrestrial",
      "surface_gravity": 0.28,
      "orbital_period_days": 4600.0,
      "rotation_period_hours": 39.8,
      "atmosphere": "trace",
      "biome_summary": "frozen",
      "hydrosphere": "ice",
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "distant icy rocky, uninhabited"
    },
    {
      "body_id": "GJ1h",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 8,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "dwarf",
      "surface_gravity": 0.11,
      "orbital_period_days": 10200.0,
      "rotation_period_hours": 26.2,
      "atmosphere": "none",
      "biome_summary": "frozen",
      "hydrosphere": "ice",
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "outermost ice dwarf"
    },
    {
      "body_id": "GJ1-oort",
      "proper_name": null,
      "body_type": "oort_cloud",
      "orbit_index": 9,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "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": "GJ1-oort-S1",
      "proper_name": "Grünfeld Horizon",
      "orbits_body_id": "GJ1-oort",
      "station_type": "horizon",
      "population": 480,
      "economic_role": "transit",
      "docking_class": "major",
      "has_gate_infrastructure": true,
      "notes": "horizon station — 2 apertures; loop_member; connects Caldwell Point and Aurelius"
    },
    {
      "station_id": "GJ1c-S1",
      "proper_name": "Speicher",
      "orbits_body_id": "GJ1c",
      "station_type": "agricultural",
      "population": 2400,
      "economic_role": "agricultural",
      "docking_class": "standard",
      "has_gate_infrastructure": false,
      "notes": "cooperative market and freight processing; agricultural export staging; Grünfeld Agricultural Consortium operations center"
    },
    {
      "station_id": "GJ1-belt-S1",
      "proper_name": "Steinwerk",
      "orbits_body_id": "GJ1-belt",
      "station_type": "industrial",
      "population": 180,
      "economic_role": "mining",
      "docking_class": "standard",
      "has_gate_infrastructure": false,
      "notes": "belt mineral sorting and processing outpost; cooperative-operated; supplements agricultural income with silicate extraction"
    }
  ]
}