{
  "system_id": "GJ 127B",
  "proper_name": "Echternach",
  "star_type": "G",
  "spectral_class": "G7 V",
  "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": "GJ127Bb",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 1,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "terrestrial",
      "surface_gravity": 0.72,
      "orbital_period_days": 92.0,
      "rotation_period_hours": 2208.0,
      "atmosphere": "none",
      "biome_summary": "barren",
      "hydrosphere": null,
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "inner rocky; tidally locked at 92-day period × 24 = 2208h rotation; heavily cratered silicate surface; no atmosphere"
    },
    {
      "body_id": "GJ127Bc",
      "proper_name": "Wiltz",
      "body_type": "planet",
      "orbit_index": 2,
      "parent_body_id": null,
      "inhabited": true,
      "population": 85000,
      "mass_class": "terrestrial",
      "surface_gravity": 0.94,
      "orbital_period_days": 320.0,
      "rotation_period_hours": 26.4,
      "atmosphere": "breathable",
      "biome_summary": "temperate-cool",
      "hydrosphere": "rivers-lakes",
      "economic_role": "mixed-agriculture",
      "settlement_pattern": "distributed-rural",
      "industrial_corridor": "west_reach",
      "notes": "primary inhabited world; outer edge of habitable zone yields cooler temperatures, longer winters, shorter growing seasons consistent with Luxembourgish-heritage founding community character; Wave 2 settlement ~400 years old; population in slow multi-generational decline (down from estimated peak ~110,000); river-valley settlements; handcraft and small-batch manufactured exports valued in corridor collector communities; imports medical hardware and high-precision components; administrative council the effective government"
    },
    {
      "body_id": "GJ127Bc-1",
      "proper_name": null,
      "body_type": "moon",
      "orbit_index": 1,
      "parent_body_id": "GJ127Bc",
      "inhabited": false,
      "population": null,
      "mass_class": "dwarf",
      "surface_gravity": 0.06,
      "orbital_period_days": 18.2,
      "rotation_period_hours": 436.8,
      "atmosphere": "none",
      "biome_summary": "barren",
      "hydrosphere": null,
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "Wiltz's single moon; tidally locked; prominent in local calendar reckoning; named informally in community usage but no formal designation"
    },
    {
      "body_id": "GJ127Bd",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 3,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "terrestrial",
      "surface_gravity": 0.58,
      "orbital_period_days": 710.0,
      "rotation_period_hours": 22.6,
      "atmosphere": "thin",
      "biome_summary": "arid",
      "hydrosphere": null,
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "dry rocky world beyond habitable zone; thin CO2 atmosphere; polar surface ice deposits; no settlement"
    },
    {
      "body_id": "GJ127B-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": "moderate-density main belt; no established extraction operations; occasional community survey passes"
    },
    {
      "body_id": "GJ127Be",
      "proper_name": null,
      "body_type": "gas_giant",
      "orbit_index": 5,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "gas_giant",
      "surface_gravity": 2.4,
      "orbital_period_days": 3100.0,
      "rotation_period_hours": 10.2,
      "atmosphere": "hydrogen-helium",
      "biome_summary": null,
      "hydrosphere": null,
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "cold gas giant; pale banding; no active resource extraction"
    },
    {
      "body_id": "GJ127Be-1",
      "proper_name": null,
      "body_type": "moon",
      "orbit_index": 1,
      "parent_body_id": "GJ127Be",
      "inhabited": false,
      "population": null,
      "mass_class": "dwarf",
      "surface_gravity": 0.09,
      "orbital_period_days": 13.8,
      "rotation_period_hours": 331.2,
      "atmosphere": "none",
      "biome_summary": "barren",
      "hydrosphere": null,
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "inner gas giant moon; cratered dark surface"
    },
    {
      "body_id": "GJ127Be-2",
      "proper_name": null,
      "body_type": "moon",
      "orbit_index": 2,
      "parent_body_id": "GJ127Be",
      "inhabited": false,
      "population": null,
      "mass_class": "dwarf",
      "surface_gravity": 0.07,
      "orbital_period_days": 29.4,
      "rotation_period_hours": 705.6,
      "atmosphere": "none",
      "biome_summary": "ice",
      "hydrosphere": null,
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "outer gas giant moon; icy surface; possible subsurface water-ice"
    },
    {
      "body_id": "GJ127Bf",
      "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": 7400.0,
      "rotation_period_hours": 19.8,
      "atmosphere": "none",
      "biome_summary": "frozen",
      "hydrosphere": null,
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "outer ice-rock world; nitrogen-methane frost; uninhabited"
    },
    {
      "body_id": "GJ127Bg",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 7,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "dwarf",
      "surface_gravity": 0.08,
      "orbital_period_days": 17200.0,
      "rotation_period_hours": 15.6,
      "atmosphere": "none",
      "biome_summary": "frozen",
      "hydrosphere": null,
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "outer ice dwarf; trans-neptunian analog"
    },
    {
      "body_id": "GJ127Bh",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 8,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "dwarf",
      "surface_gravity": 0.05,
      "orbital_period_days": 34000.0,
      "rotation_period_hours": 12.4,
      "atmosphere": "none",
      "biome_summary": "frozen",
      "hydrosphere": null,
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "distant outer ice dwarf"
    },
    {
      "body_id": "GJ127Bi",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 9,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "dwarf",
      "surface_gravity": 0.04,
      "orbital_period_days": 62000.0,
      "rotation_period_hours": 11.0,
      "atmosphere": "none",
      "biome_summary": "frozen",
      "hydrosphere": null,
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "very distant outer ice dwarf; scattered disk object"
    },
    {
      "body_id": "GJ127Bj",
      "proper_name": null,
      "body_type": "planet",
      "orbit_index": 10,
      "parent_body_id": null,
      "inhabited": false,
      "population": null,
      "mass_class": "dwarf",
      "surface_gravity": 0.03,
      "orbital_period_days": 105000.0,
      "rotation_period_hours": 9.8,
      "atmosphere": "none",
      "biome_summary": "frozen",
      "hydrosphere": null,
      "economic_role": null,
      "settlement_pattern": null,
      "industrial_corridor": null,
      "notes": "extreme outer ice dwarf; detached scattered-disk object"
    },
    {
      "body_id": "GJ127B-oort",
      "proper_name": null,
      "body_type": "oort_cloud",
      "orbit_index": 11,
      "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; gate infrastructure sited here"
    }
  ],
  "stations": [
    {
      "station_id": "GJ127B-oort-S1",
      "proper_name": "Sauer Horizon",
      "orbits_body_id": "GJ127B-oort",
      "station_type": "horizon",
      "population": 4500,
      "economic_role": "transit",
      "docking_class": "major",
      "has_gate_infrastructure": true,
      "notes": "two-aperture through-route horizon station; named for the Sauer River of the Luxembourgish homeland preserved in Echternach community memory; working relationship with Alshain transit authority for inbound aperture and Bout du Chemin equivalent for outbound; modest transit traffic volume; operates as community annex rather than commercial hub; administrative council coordinates scheduling and access agreements"
    }
  ]
}