{
  "system_id": "GJ 357",
  "proper_name": "Altmark",
  "star_type": "K",
  "spectral_class": "K3V",
  "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": "GJ357b",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 1,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "terrestrial",
      "surface_gravity": 0.40,
      "orbital_period_days": 18.0,
      "rotation_period_hours": 19.2,
      "atmosphere": "none",
      "biome_summary": "barren",
      "hydrosphere": null,
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "inner rocky, hot, uninhabited"
    },
    {
      "body_id": "GJ357c",
      "proper_name": "Stendal",
      "body_type": "planet",
      "orbit_index": 2,
      "parent_body_id": null,
      "inhabited": true,
      "population": 350000000,
      "mass_class": "terrestrial",
      "surface_gravity": 0.92,
      "orbital_period_days": 200.0,
      "rotation_period_hours": 27.6,
      "atmosphere": "standard",
      "biome_summary": "temperate",
      "hydrosphere": "liquid_water",
      "economic_role": "commercial",
      "settlement_pattern": "urban_concentrated",
      "industrial_corridor": "logistics_manufacturing",
      "notes": "primary inhabited world; wave_4 German heritage (Brandenburg historical region naming); 5-aperture hub; second-largest west_reach commercial system; diversified economy: heavy fabrication, agriculture (supplemental lighting, cold-tolerant strains), financial services, transit logistics; bicameral governance (commercial council + elected assembly); Assembly trade delegate based here"
    },
    {
      "body_id": "GJ357-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": "mining",
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "inner orbital belt; raw material source for Walzwerk fabrication"
    },
    {
      "body_id": "GJ357d",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 4,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "terrestrial",
      "surface_gravity": 0.56,
      "orbital_period_days": 620.0,
      "rotation_period_hours": 28.4,
      "atmosphere": "thin",
      "biome_summary": "cold_arid",
      "hydrosphere": null,
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "outer rocky, uninhabited"
    },
    {
      "body_id": "GJ357e",
      "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": 1800.0,
      "rotation_period_hours": 11.2,
      "atmosphere": "gas_giant",
      "biome_summary": null,
      "hydrosphere": null,
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "outer gas giant, two moons"
    },
    {
      "body_id": "GJ357e-m1",
      "proper_name": null,
      "body_type": "moon",
      "orbit_index": 1,
      "parent_body_id": "GJ357e",
      "inhabited": false,
      "population": null,
      "mass_class": "dwarf",
      "surface_gravity": 0.13,
      "orbital_period_days": 5.6,
      "rotation_period_hours": 134.4,
      "atmosphere": "trace",
      "biome_summary": "frozen",
      "hydrosphere": null,
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "icy moon, tidally locked"
    },
    {
      "body_id": "GJ357e-m2",
      "proper_name": null,
      "body_type": "moon",
      "orbit_index": 2,
      "parent_body_id": "GJ357e",
      "inhabited": false,
      "population": null,
      "mass_class": "dwarf",
      "surface_gravity": 0.08,
      "orbital_period_days": 12.2,
      "rotation_period_hours": 292.8,
      "atmosphere": null,
      "biome_summary": "barren",
      "hydrosphere": null,
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "small rocky moon, tidally locked"
    },
    {
      "body_id": "GJ357f",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 6,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "terrestrial",
      "surface_gravity": 0.44,
      "orbital_period_days": 4800.0,
      "rotation_period_hours": 34.8,
      "atmosphere": "trace",
      "biome_summary": "frozen",
      "hydrosphere": "ice",
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "outer icy rocky, uninhabited"
    },
    {
      "body_id": "GJ357g",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 7,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "terrestrial",
      "surface_gravity": 0.35,
      "orbital_period_days": 10800.0,
      "rotation_period_hours": 42.6,
      "atmosphere": "trace",
      "biome_summary": "frozen",
      "hydrosphere": "ice",
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "distant icy rocky, uninhabited"
    },
    {
      "body_id": "GJ357h",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 8,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "terrestrial",
      "surface_gravity": 0.27,
      "orbital_period_days": 22000.0,
      "rotation_period_hours": 51.4,
      "atmosphere": "none",
      "biome_summary": "frozen",
      "hydrosphere": "ice",
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "far outer icy rocky, uninhabited"
    },
    {
      "body_id": "GJ357i",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 9,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "dwarf",
      "surface_gravity": 0.11,
      "orbital_period_days": 44000.0,
      "rotation_period_hours": 29.8,
      "atmosphere": "none",
      "biome_summary": "frozen",
      "hydrosphere": "ice",
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "outermost dwarf, near oort boundary"
    },
    {
      "body_id": "GJ357-oort",
      "proper_name": null,
      "body_type": "oort_cloud",
      "orbit_index": 10,
      "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": "GJ357-oort-S1",
      "proper_name": "Altmark Horizon",
      "orbits_body_id": "GJ357-oort",
      "station_type": "horizon",
      "population": 9800,
      "economic_role": "transit",
      "docking_class": "major",
      "has_gate_infrastructure": true,
      "notes": "horizon station — 5 apertures; hub; connects Hansestadt, Eisentor, Groenland, Stilmark, and Bestevaer"
    },
    {
      "station_id": "GJ357c-S1",
      "proper_name": "Markwerk",
      "orbits_body_id": "GJ357c",
      "station_type": "industrial",
      "population": 42000,
      "economic_role": "manufacturing",
      "docking_class": "major",
      "has_gate_infrastructure": false,
      "notes": "MVG regional distribution hub; heavy fabrication complex; MVG supplier contracts; largest MVG physical footprint in outer corridor; two of nine commercial council seats"
    },
    {
      "station_id": "GJ357c-S2",
      "proper_name": "Kontor",
      "orbits_body_id": "GJ357c",
      "station_type": "commercial",
      "population": 18000,
      "economic_role": "commercial",
      "docking_class": "major",
      "has_gate_infrastructure": false,
      "notes": "financial services complex; banks, bond houses, commercial arbitration; services trade volume from five gates; Assembly trade delegate office"
    },
    {
      "station_id": "GJ357-belt-S1",
      "proper_name": "Walzwerk",
      "orbits_body_id": "GJ357-belt",
      "station_type": "industrial",
      "population": 8200,
      "economic_role": "manufacturing",
      "docking_class": "major",
      "has_gate_infrastructure": false,
      "notes": "inner orbital belt fabrication yard; heavy component manufacturing; supplies outward corridor systems"
    },
    {
      "station_id": "GJ357c-S3",
      "proper_name": "Torwache",
      "orbits_body_id": "GJ357c",
      "station_type": "commercial",
      "population": 6400,
      "economic_role": "transit",
      "docking_class": "major",
      "has_gate_infrastructure": false,
      "notes": "Gate Corporation western sector secondary operations; five-aperture scheduling coordination; significant operational presence"
    }
  ]
}