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data(atlas): author Fremantle (GJ 273) — Bunbury, Guildford, Bayswater, Onslow

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Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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jpmschweitzer
2026-03-25 16:23:26 +01:00
co-authored by Claude Opus 4.6
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docs/atlas/proposals/GJ273.json
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{
"system_id": "GJ 273",
"proper_name": "Fremantle",
"star_type": "M",
"spectral_class": "M5",
"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": "GJ273b", "proper_name": null, "body_type": "planet", "orbit_index": 1, "parent_body_id": null, "inhabited": false, "population": 0, "mass_class": "terrestrial", "surface_gravity": 0.30, "orbital_period_days": 2, "rotation_period_hours": 48, "atmosphere": "none", "biome_summary": "barren", "hydrosphere": "none", "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "inner scorched rocky, tidally locked, flare-exposed"},
{"body_id": "GJ273c", "proper_name": "Bunbury", "body_type": "planet", "orbit_index": 2, "parent_body_id": null, "inhabited": true, "population": 800000000, "mass_class": "terrestrial", "surface_gravity": 0.88, "orbital_period_days": 12, "rotation_period_hours": 288, "atmosphere": "breathable", "biome_summary": "temperate", "hydrosphere": "moderate", "economic_role": "coordination", "settlement_pattern": "urban", "industrial_corridor": "gate_corp", "notes": "primary inhabited world, Wave 2 colony, 400 years of settlement, Gate Corporation maintenance academy, institutional junction, tidally locked with adapted agriculture"},
{"body_id": "GJ273c-1", "proper_name": null, "body_type": "moon", "orbit_index": 1, "parent_body_id": "GJ273c", "inhabited": false, "population": 0, "mass_class": "dwarf", "surface_gravity": 0.05, "orbital_period_days": 3, "rotation_period_hours": 72, "atmosphere": "none", "biome_summary": "barren", "hydrosphere": "none", "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "small moon"},
{"body_id": "GJ273d", "proper_name": null, "body_type": "planet", "orbit_index": 3, "parent_body_id": null, "inhabited": false, "population": 0, "mass_class": "terrestrial", "surface_gravity": 0.40, "orbital_period_days": 35, "rotation_period_hours": 18.0, "atmosphere": "thin", "biome_summary": "arid", "hydrosphere": "none", "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "rocky, beyond habitable zone"},
{"body_id": "GJ273e", "proper_name": null, "body_type": "planet", "orbit_index": 4, "parent_body_id": null, "inhabited": false, "population": 0, "mass_class": "terrestrial", "surface_gravity": 0.32, "orbital_period_days": 100, "rotation_period_hours": 15.0, "atmosphere": "thin", "biome_summary": "frozen", "hydrosphere": "ice", "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "cold rocky"},
{"body_id": "GJ273f", "proper_name": null, "body_type": "planet", "orbit_index": 5, "parent_body_id": null, "inhabited": false, "population": 0, "mass_class": "terrestrial", "surface_gravity": 0.28, "orbital_period_days": 285, "rotation_period_hours": 22.0, "atmosphere": "none", "biome_summary": "frozen", "hydrosphere": "ice", "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "outer cold rocky"},
{"body_id": "GJ273g", "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": 1100, "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": "GJ273g-1", "proper_name": null, "body_type": "moon", "orbit_index": 1, "parent_body_id": "GJ273g", "inhabited": false, "population": 0, "mass_class": "dwarf", "surface_gravity": 0.06, "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": "GJ273g-2", "proper_name": null, "body_type": "moon", "orbit_index": 2, "parent_body_id": "GJ273g", "inhabited": false, "population": 0, "mass_class": "dwarf", "surface_gravity": 0.04, "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": "GJ273h", "proper_name": null, "body_type": "planet", "orbit_index": 7, "parent_body_id": null, "inhabited": false, "population": 0, "mass_class": "terrestrial", "surface_gravity": 0.20, "orbital_period_days": 3200, "rotation_period_hours": 16.0, "atmosphere": "none", "biome_summary": "frozen", "hydrosphere": "ice", "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "distant ice dwarf"},
{"body_id": "GJ273-belt", "proper_name": null, "body_type": "asteroid_belt", "orbit_index": 8, "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": "GJ273-oort", "proper_name": null, "body_type": "oort_cloud", "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": "oort cloud"}
],
"stations": [
{"station_id": "GJ273c-S1", "proper_name": "Guildford", "orbits_body_id": "GJ273c", "station_type": "research", "population": 45000000, "economic_role": "coordination", "docking_class": "major", "has_gate_infrastructure": false, "notes": "Gate Corporation maintenance academy, north_reach gate technician training, 300 years of aperture repair archives"},
{"station_id": "GJ273c-S2", "proper_name": "Bayswater", "orbits_body_id": "GJ273c", "station_type": "transit", "population": 8000000, "economic_role": "transit", "docking_class": "major", "has_gate_infrastructure": false, "notes": "junction transit hub, 3-aperture routing"},
{"station_id": "GJ273-oort-S1", "proper_name": "Onslow", "orbits_body_id": "GJ273-oort", "station_type": "horizon", "population": 3000, "economic_role": "transit", "docking_class": "major", "has_gate_infrastructure": true, "notes": "horizon station, 3 apertures, resident gate maintenance crew rotating from Guildford academy"}
]
}
wiki/star-systems/GJ-273/index.md
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`wave_2` at `hop_distance: 4` with `junction` topology makes Fremantle structurally important without being a named power center. Its M5 stellar class is unremarkable — the habitable body orbits very close in, as is typical for M-dwarf settlement — but the system's value was never its physical characteristics. It was the gate convergence point, and four centuries of institutional investment have made the convergence the reality rather than an accident of topology.
## Celestial Bodies
<!-- READ-ONLY — generated from systems.db bodies/stations tables -->
| Orbit | ID | Name | Type | Inhabited | Pop | Mass | Gravity | Year (d) | Day (h) | Atmo | Biome | Hydro | Economy | Settlement | Industrial |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | `GJ273b` | — | planet | no | — | terrestrial | 0.30g | 2 | 48.0 | none | barren | none | — | — | — |
| 2 | `GJ273c` | Bunbury | planet | yes | 800M | terrestrial | 0.88g | 12 | 288.0 | breathable | temperate | moderate | coordination | urban | gate_corp |
| ↳ 2.1 | `GJ273c-1` | — | moon | no | — | dwarf | 0.05g | 3 | 72.0 | none | barren | none | — | — | — |
| 3 | `GJ273d` | — | planet | no | — | terrestrial | 0.40g | 35 | 18.0 | thin | arid | none | — | — | — |
| 4 | `GJ273e` | — | planet | no | — | terrestrial | 0.32g | 100 | 15.0 | thin | frozen | ice | — | — | — |
| 5 | `GJ273f` | — | planet | no | — | terrestrial | 0.28g | 285 | 22.0 | none | frozen | ice | — | — | — |
| 6 | `GJ273g` | — | gas_giant | no | — | gas_giant | — | 1100 | 11.0 | dense | — | — | — | — | — |
| ↳ 6.1 | `GJ273g-1` | — | moon | no | — | dwarf | 0.06g | 5 | 120.0 | none | barren | none | — | — | — |
| ↳ 6.2 | `GJ273g-2` | — | moon | no | — | dwarf | 0.04g | 12 | 288.0 | none | frozen | ice | — | — | — |
| 7 | `GJ273h` | — | planet | no | — | terrestrial | 0.20g | 3200 | 16.0 | none | frozen | ice | — | — | — |
| 8 | `GJ273-belt` | — | asteroid_belt | no | — | — | — | — | — | — | — | — | — | — | — |
| 9 | `GJ273-oort` | — | oort_cloud | no | — | — | — | — | — | — | — | — | — | — | — |
### Stations & Facilities
| ID | Name | Type | Orbits | Population | Economy | Governance | Docking | Gate | Districts |
|---|---|---|---|---|---|---|---|---|---|
| `GJ273-oort-S1` | Onslow | horizon | `GJ273-oort` | 3K | transit | — | major | yes | 1 |
| `GJ273c-S1` | Guildford | research | `GJ273c` | 45M | coordination | — | major | no | 1 |
| `GJ273c-S2` | Bayswater | transit | `GJ273c` | 8M | transit | — | major | no | 1 |
## Topology
<!-- READ-ONLY — regenerated from star-map.json edges -->
- **Hop Distance from Gateway:** 4