{
  "system_id": "GJ 638",
  "proper_name": "Greymantle",
  "star_type": "K",
  "spectral_class": "K7V",
  "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": "GJ638b",
      "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": 15,
      "rotation_period_hours": 360,
      "atmosphere": "none",
      "biome_summary": "barren",
      "hydrosphere": "none",
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "inner rocky, tidally locked"
    },
    {
      "body_id": "GJ638c",
      "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": 40,
      "rotation_period_hours": 960,
      "atmosphere": "thin",
      "biome_summary": "arid",
      "hydrosphere": "none",
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "rocky, tidally locked"
    },
    {
      "body_id": "GJ638d",
      "proper_name": "Halton",
      "body_type": "planet",
      "orbit_index": 3,
      "parent_body_id": null,
      "inhabited": true,
      "population": 600,
      "mass_class": "terrestrial",
      "surface_gravity": 0.82,
      "orbital_period_days": 100,
      "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, persistent atmospheric mineral haze, diffuse pale light, grey landscape, K7V star dimmed further by particulate, precipitator-collected aluminosilicate filter powder export, Colour Society vivid interiors, Wave 2 Australian-English heritage from Ashfield"
    },
    {
      "body_id": "GJ638e",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 4,
      "parent_body_id": null,
      "inhabited": false,
      "population": 0,
      "mass_class": "terrestrial",
      "surface_gravity": 0.38,
      "orbital_period_days": 250,
      "rotation_period_hours": 17.0,
      "atmosphere": "thin",
      "biome_summary": "frozen",
      "hydrosphere": "ice",
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "cold rocky"
    },
    {
      "body_id": "GJ638f",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 5,
      "parent_body_id": null,
      "inhabited": false,
      "population": 0,
      "mass_class": "terrestrial",
      "surface_gravity": 0.3,
      "orbital_period_days": 600,
      "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": "GJ638g",
      "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": 1800,
      "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": "GJ638g-1",
      "proper_name": null,
      "body_type": "moon",
      "orbit_index": 1,
      "parent_body_id": "GJ638g",
      "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": "GJ638g-2",
      "proper_name": null,
      "body_type": "moon",
      "orbit_index": 2,
      "parent_body_id": "GJ638g",
      "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": "GJ638h",
      "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": 4500,
      "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": "GJ638i",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 8,
      "parent_body_id": null,
      "inhabited": false,
      "population": 0,
      "mass_class": "dwarf",
      "surface_gravity": 0.1,
      "orbital_period_days": 8500,
      "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": "GJ638-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": "GJ638-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": "GJ638d-S1",
      "proper_name": "Ridley",
      "orbits_body_id": "GJ638d",
      "station_type": "industrial",
      "population": 0,
      "economic_role": "extraction",
      "docking_class": "restricted",
      "has_gate_infrastructure": false,
      "notes": "Precipitator Collective processing and export staging, filter powder grading and packaging, Colour Society pigment library"
    },
    {
      "station_id": "GJ638-oort-S1",
      "proper_name": "Corbridge",
      "orbits_body_id": "GJ638-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 Ashfield"
    }
  ]
}