{
  "system_id": "GJ 848",
  "proper_name": "Shimanami",
  "star_type": "F",
  "spectral_class": "F5V",
  "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": "GJ848b",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 1,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "terrestrial",
      "surface_gravity": 0.54,
      "orbital_period_days": 68.0,
      "rotation_period_hours": 17.6,
      "atmosphere": "none",
      "biome_summary": "barren",
      "hydrosphere": null,
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "inner rocky, hot, uninhabited"
    },
    {
      "body_id": "GJ848c",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 2,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "terrestrial",
      "surface_gravity": 0.76,
      "orbital_period_days": 260.0,
      "rotation_period_hours": 23.4,
      "atmosphere": "thin",
      "biome_summary": "hot_arid",
      "hydrosphere": null,
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "hot inner rocky, Venus-zone, uninhabited"
    },
    {
      "body_id": "GJ848d",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 3,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "terrestrial",
      "surface_gravity": 0.82,
      "orbital_period_days": 520.0,
      "rotation_period_hours": 26.8,
      "atmosphere": "standard",
      "biome_summary": "hot_arid",
      "hydrosphere": null,
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "inner hot zone, warm rocky, uninhabited"
    },
    {
      "body_id": "GJ848e",
      "proper_name": "Shimanami Main",
      "body_type": "planet",
      "orbit_index": 4,
      "parent_body_id": null,
      "inhabited": true,
      "population": 48000,
      "mass_class": "terrestrial",
      "surface_gravity": 0.94,
      "orbital_period_days": 800.0,
      "rotation_period_hours": 24.2,
      "atmosphere": "standard",
      "biome_summary": "temperate",
      "hydrosphere": "liquid_water",
      "economic_role": "mining",
      "settlement_pattern": "urban_concentrated",
      "industrial_corridor": "mining_refractories",
      "notes": "primary inhabited world; wave_3 Japanese heritage (Oshima extraction origin); 2-aperture through_route; F5V genuine daylight; rare-earth mineral extraction; Naminato primary settlement (Japanese-Vietnamese bilingual); Transit Cooperative controls gate scheduling; Oshima administrative charter (extraction-era instrument, never updated for permanent population)"
    },
    {
      "body_id": "GJ848-belt",
      "proper_name": null,
      "body_type": "asteroid_belt",
      "orbit_index": 5,
      "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": "rare-earth mineral belt; active extraction under Oshima charter"
    },
    {
      "body_id": "GJ848f",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 6,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "terrestrial",
      "surface_gravity": 0.62,
      "orbital_period_days": 1800.0,
      "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": "GJ848g",
      "proper_name": null,
      "body_type": "gas_giant",
      "orbit_index": 7,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": null,
      "surface_gravity": null,
      "orbital_period_days": 5200.0,
      "rotation_period_hours": 10.2,
      "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": "GJ848g-m1",
      "proper_name": null,
      "body_type": "moon",
      "orbit_index": 1,
      "parent_body_id": "GJ848g",
      "inhabited": false,
      "population": null,
      "mass_class": "dwarf",
      "surface_gravity": 0.14,
      "orbital_period_days": 7.2,
      "rotation_period_hours": 172.8,
      "atmosphere": "trace",
      "biome_summary": "frozen",
      "hydrosphere": null,
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "icy moon, tidally locked"
    },
    {
      "body_id": "GJ848g-m2",
      "proper_name": null,
      "body_type": "moon",
      "orbit_index": 2,
      "parent_body_id": "GJ848g",
      "inhabited": false,
      "population": null,
      "mass_class": "dwarf",
      "surface_gravity": 0.09,
      "orbital_period_days": 15.4,
      "rotation_period_hours": 369.6,
      "atmosphere": null,
      "biome_summary": "barren",
      "hydrosphere": null,
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "small rocky moon, tidally locked"
    },
    {
      "body_id": "GJ848h",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 8,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "terrestrial",
      "surface_gravity": 0.48,
      "orbital_period_days": 13000.0,
      "rotation_period_hours": 36.2,
      "atmosphere": "trace",
      "biome_summary": "frozen",
      "hydrosphere": "ice",
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "outer icy rocky, uninhabited"
    },
    {
      "body_id": "GJ848i",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 9,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "terrestrial",
      "surface_gravity": 0.38,
      "orbital_period_days": 28000.0,
      "rotation_period_hours": 44.6,
      "atmosphere": "trace",
      "biome_summary": "frozen",
      "hydrosphere": "ice",
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "distant icy rocky, uninhabited"
    },
    {
      "body_id": "GJ848j",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 10,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "terrestrial",
      "surface_gravity": 0.29,
      "orbital_period_days": 52000.0,
      "rotation_period_hours": 53.4,
      "atmosphere": "none",
      "biome_summary": "frozen",
      "hydrosphere": "ice",
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "far outer icy rocky, uninhabited"
    },
    {
      "body_id": "GJ848k",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 11,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "dwarf",
      "surface_gravity": 0.12,
      "orbital_period_days": 92000.0,
      "rotation_period_hours": 30.8,
      "atmosphere": "none",
      "biome_summary": "frozen",
      "hydrosphere": "ice",
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "outermost dwarf, near oort boundary"
    },
    {
      "body_id": "GJ848-oort",
      "proper_name": null,
      "body_type": "oort_cloud",
      "orbit_index": 12,
      "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": "GJ848-oort-S1",
      "proper_name": "Shimanami Horizon",
      "orbits_body_id": "GJ848-oort",
      "station_type": "horizon",
      "population": 520,
      "economic_role": "transit",
      "docking_class": "major",
      "has_gate_infrastructure": true,
      "notes": "horizon station — 2 apertures; through_route; connects Oshima and Dài Lộ; Transit Cooperative manages scheduling"
    }
  ]
}