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data(atlas): author Pemberton's Loop (GJ 3618) — Fenchurch, Gravesend

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Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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jpmschweitzer
2026-03-25 16:26:15 +01:00
co-authored by Claude Opus 4.6
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commit 2f1d199d66
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docs/atlas/proposals/GJ3618.json
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{
"system_id": "GJ 3618",
"proper_name": "Pemberton's Loop",
"star_type": "M",
"spectral_class": "m",
"wiki_data": {
"habitable_count": 0,
"inhabited_count": 0,
"has_gas_giant": true,
"has_asteroid_belt": true,
"has_horizon_station": true,
"raw_bodies_line": null
},
"bodies": [
{"body_id": "GJ3618b", "proper_name": null, "body_type": "planet", "orbit_index": 1, "parent_body_id": null, "inhabited": false, "population": 0, "mass_class": "terrestrial", "surface_gravity": 0.28, "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": "inner scorched, tidally locked"},
{"body_id": "GJ3618c", "proper_name": null, "body_type": "planet", "orbit_index": 2, "parent_body_id": null, "inhabited": false, "population": 0, "mass_class": "terrestrial", "surface_gravity": 0.45, "orbital_period_days": 9, "rotation_period_hours": 216, "atmosphere": "thin", "biome_summary": "barren", "hydrosphere": "none", "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "edge of habitable zone, marginal, tidally locked"},
{"body_id": "GJ3618d", "proper_name": null, "body_type": "planet", "orbit_index": 3, "parent_body_id": null, "inhabited": false, "population": 0, "mass_class": "terrestrial", "surface_gravity": 0.38, "orbital_period_days": 25, "rotation_period_hours": 16.0, "atmosphere": "thin", "biome_summary": "arid", "hydrosphere": "none", "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "cold rocky, beyond habitable zone"},
{"body_id": "GJ3618e", "proper_name": null, "body_type": "planet", "orbit_index": 4, "parent_body_id": null, "inhabited": false, "population": 0, "mass_class": "terrestrial", "surface_gravity": 0.30, "orbital_period_days": 100, "rotation_period_hours": 14.0, "atmosphere": "none", "biome_summary": "frozen", "hydrosphere": "ice", "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "frozen rocky"},
{"body_id": "GJ3618f", "proper_name": null, "body_type": "gas_giant", "orbit_index": 5, "parent_body_id": null, "inhabited": false, "population": 0, "mass_class": "gas_giant", "surface_gravity": null, "orbital_period_days": 600, "rotation_period_hours": 10.5, "atmosphere": "dense", "biome_summary": null, "hydrosphere": null, "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "moderate gas giant"},
{"body_id": "GJ3618f-1", "proper_name": null, "body_type": "moon", "orbit_index": 1, "parent_body_id": "GJ3618f", "inhabited": false, "population": 0, "mass_class": "dwarf", "surface_gravity": 0.05, "orbital_period_days": 4, "rotation_period_hours": 96, "atmosphere": "none", "biome_summary": "barren", "hydrosphere": "none", "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "inner gas giant moon"},
{"body_id": "GJ3618f-2", "proper_name": null, "body_type": "moon", "orbit_index": 2, "parent_body_id": "GJ3618f", "inhabited": false, "population": 0, "mass_class": "dwarf", "surface_gravity": 0.03, "orbital_period_days": 10, "rotation_period_hours": 240, "atmosphere": "none", "biome_summary": "frozen", "hydrosphere": "ice", "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "icy outer gas giant moon"},
{"body_id": "GJ3618g", "proper_name": null, "body_type": "planet", "orbit_index": 6, "parent_body_id": null, "inhabited": false, "population": 0, "mass_class": "terrestrial", "surface_gravity": 0.22, "orbital_period_days": 2400, "rotation_period_hours": 18.0, "atmosphere": "none", "biome_summary": "frozen", "hydrosphere": "ice", "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "distant ice dwarf"},
{"body_id": "GJ3618h", "proper_name": null, "body_type": "planet", "orbit_index": 7, "parent_body_id": null, "inhabited": false, "population": 0, "mass_class": "dwarf", "surface_gravity": 0.12, "orbital_period_days": 5200, "rotation_period_hours": 20.0, "atmosphere": "none", "biome_summary": "frozen", "hydrosphere": "ice", "economic_role": null, "settlement_pattern": null, "industrial_corridor": null, "notes": "distant ice dwarf"},
{"body_id": "GJ3618-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": "sparse outer belt"},
{"body_id": "GJ3618-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": "GJ3618c-S1", "proper_name": "Fenchurch", "orbits_body_id": "GJ3618c", "station_type": "commercial", "population": 150000000, "economic_role": "transit", "docking_class": "major", "has_gate_infrastructure": false, "notes": "primary transit hub, bonded warehousing complex, cargo-sorting yards, Assembly customs inspection office, 400 years of transit operations, Pemberton Heritage Association arbitration"},
{"station_id": "GJ3618-oort-S1", "proper_name": "Gravesend", "orbits_body_id": "GJ3618-oort", "station_type": "horizon", "population": 0, "economic_role": "transit", "docking_class": "major", "has_gate_infrastructure": true, "notes": "horizon station, 2 apertures"}
]
}
wiki/star-systems/GJ-3618/index.md
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## Calibration Note
Loop_member topology at hop 4 with wave_2 settlement is consistent — this was a planned transit node from early in the loop's construction, not an organic settlement that grew outward. The absence of a planetary economy is intentional; the system's value is entirely positional.
## 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 | `GJ3618b` | — | planet | no | — | terrestrial | 0.28g | 3 | 72.0 | none | barren | none | — | — | — |
| 2 | `GJ3618c` | — | planet | no | — | terrestrial | 0.45g | 9 | 216.0 | thin | barren | none | — | — | — |
| 3 | `GJ3618d` | — | planet | no | — | terrestrial | 0.38g | 25 | 16.0 | thin | arid | none | — | — | — |
| 4 | `GJ3618e` | — | planet | no | — | terrestrial | 0.30g | 100 | 14.0 | none | frozen | ice | — | — | — |
| 5 | `GJ3618f` | — | gas_giant | no | — | gas_giant | — | 600 | 10.5 | dense | — | — | — | — | — |
| ↳ 5.1 | `GJ3618f-1` | — | moon | no | — | dwarf | 0.05g | 4 | 96.0 | none | barren | none | — | — | — |
| ↳ 5.2 | `GJ3618f-2` | — | moon | no | — | dwarf | 0.03g | 10 | 240.0 | none | frozen | ice | — | — | — |
| 6 | `GJ3618g` | — | planet | no | — | terrestrial | 0.22g | 2400 | 18.0 | none | frozen | ice | — | — | — |
| 7 | `GJ3618h` | — | planet | no | — | dwarf | 0.12g | 5200 | 20.0 | none | frozen | ice | — | — | — |
| 8 | `GJ3618-belt` | — | asteroid_belt | no | — | — | — | — | — | — | — | — | — | — | — |
| 9 | `GJ3618-oort` | — | oort_cloud | no | — | — | — | — | — | — | — | — | — | — | — |
### Stations & Facilities
| ID | Name | Type | Orbits | Population | Economy | Governance | Docking | Gate | Districts |
|---|---|---|---|---|---|---|---|---|---|
| `GJ3618-oort-S1` | Gravesend | horizon | `GJ3618-oort` | — | transit | — | major | yes | 1 |
| `GJ3618c-S1` | Fenchurch | commercial | `GJ3618c` | 150M | transit | — | major | no | 1 |