{
  "system_id": "GJ 625",
  "proper_name": "Songjiang",
  "star_type": "M",
  "spectral_class": "M2V",
  "wiki_data": {
    "habitable_count": 2,
    "inhabited_count": 2,
    "has_gas_giant": true,
    "has_asteroid_belt": true,
    "has_horizon_station": true,
    "raw_bodies_line": null
  },
  "bodies": [
    {
      "body_id": "GJ625b",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 1,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "terrestrial",
      "surface_gravity": 0.32,
      "orbital_period_days": 8.4,
      "rotation_period_hours": 201.6,
      "atmosphere": "none",
      "biome_summary": "barren",
      "hydrosphere": null,
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "inner scorched rocky, tidally locked"
    },
    {
      "body_id": "GJ625c",
      "proper_name": "Songjiang Primary",
      "body_type": "planet",
      "orbit_index": 2,
      "parent_body_id": null,
      "inhabited": true,
      "population": 2000000,
      "mass_class": "terrestrial",
      "surface_gravity": 0.86,
      "orbital_period_days": 65.0,
      "rotation_period_hours": 1560.0,
      "atmosphere": "standard",
      "biome_summary": "temperate_terminator",
      "hydrosphere": "liquid_water",
      "economic_role": "commercial",
      "settlement_pattern": "urban_concentrated",
      "industrial_corridor": "logistics_manufacturing",
      "notes": "administrative and commercial center; tidally locked; wave_2 Shanghainese heritage (Wei Songjiang founder); Dual Council governance with Primary/Secondary representation; functioning industrial base, universities, professional associations, local press; Assembly Coordination Office (6 rotating personnel)"
    },
    {
      "body_id": "GJ625d",
      "proper_name": "Songjiang Secondary",
      "body_type": "planet",
      "orbit_index": 3,
      "parent_body_id": null,
      "inhabited": true,
      "population": 650000,
      "mass_class": "terrestrial",
      "surface_gravity": 0.78,
      "orbital_period_days": 110.0,
      "rotation_period_hours": 2640.0,
      "atmosphere": "standard",
      "biome_summary": "temperate_terminator",
      "hydrosphere": "liquid_water",
      "economic_role": "agricultural",
      "settlement_pattern": "dispersed",
      "industrial_corridor": "agricultural_export",
      "notes": "agricultural world; tidally locked; cooler climate; more conservative, culturally homogeneous population; food surplus exports; tension with Primary over Dual Council representation weighting"
    },
    {
      "body_id": "GJ625-belt",
      "proper_name": null,
      "body_type": "asteroid_belt",
      "orbit_index": 4,
      "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": "asteroid belt between inner and outer system"
    },
    {
      "body_id": "GJ625e",
      "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": 520.0,
      "rotation_period_hours": 11.8,
      "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": "GJ625e-m1",
      "proper_name": null,
      "body_type": "moon",
      "orbit_index": 1,
      "parent_body_id": "GJ625e",
      "inhabited": false,
      "population": null,
      "mass_class": "dwarf",
      "surface_gravity": 0.12,
      "orbital_period_days": 5.4,
      "rotation_period_hours": 129.6,
      "atmosphere": "trace",
      "biome_summary": "frozen",
      "hydrosphere": null,
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "icy moon, tidally locked"
    },
    {
      "body_id": "GJ625e-m2",
      "proper_name": null,
      "body_type": "moon",
      "orbit_index": 2,
      "parent_body_id": "GJ625e",
      "inhabited": false,
      "population": null,
      "mass_class": "dwarf",
      "surface_gravity": 0.08,
      "orbital_period_days": 11.8,
      "rotation_period_hours": 283.2,
      "atmosphere": null,
      "biome_summary": "barren",
      "hydrosphere": null,
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "small rocky moon, tidally locked"
    },
    {
      "body_id": "GJ625f",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 6,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "terrestrial",
      "surface_gravity": 0.38,
      "orbital_period_days": 1600.0,
      "rotation_period_hours": 32.6,
      "atmosphere": "trace",
      "biome_summary": "frozen",
      "hydrosphere": "ice",
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "outer icy rocky, uninhabited"
    },
    {
      "body_id": "GJ625g",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 7,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "terrestrial",
      "surface_gravity": 0.29,
      "orbital_period_days": 4200.0,
      "rotation_period_hours": 40.8,
      "atmosphere": "trace",
      "biome_summary": "frozen",
      "hydrosphere": "ice",
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "distant icy rocky, uninhabited"
    },
    {
      "body_id": "GJ625h",
      "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": 9800.0,
      "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": "GJ625-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": "GJ625-oort-S1",
      "proper_name": "Songjiang Horizon",
      "orbits_body_id": "GJ625-oort",
      "station_type": "horizon",
      "population": 1200,
      "economic_role": "transit",
      "docking_class": "major",
      "has_gate_infrastructure": true,
      "notes": "horizon station — 2 apertures; spur_end; connects Jinghu and Marunong; Outer Coordination Bureau manages stub system relationships"
    }
  ]
}