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data(atlas): author GJ 454 (Steinfeld) — west_reach

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Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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jpmschweitzer
2026-03-30 11:42:20 +02:00
co-authored by Claude Opus 4.6
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docs/atlas/proposals/GJ454.json
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{
"system_id": "GJ 454",
"proper_name": "Steinfeld",
"star_type": "K",
"spectral_class": "K0IV",
"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": "GJ454b",
"proper_name": null,
"body_type": "planet",
"orbit_index": 1,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "terrestrial",
"surface_gravity": 0.46,
"orbital_period_days": 32.0,
"rotation_period_hours": 18.8,
"atmosphere": "none",
"biome_summary": "barren",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "inner rocky, hot, uninhabited"
},
{
"body_id": "GJ454c",
"proper_name": null,
"body_type": "planet",
"orbit_index": 2,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "terrestrial",
"surface_gravity": 0.72,
"orbital_period_days": 160.0,
"rotation_period_hours": 22.4,
"atmosphere": "thin",
"biome_summary": "hot_arid",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "inner rocky, desiccated, uninhabited"
},
{
"body_id": "GJ454d",
"proper_name": "Graustein",
"body_type": "planet",
"orbit_index": 3,
"parent_body_id": null,
"inhabited": true,
"population": 28000,
"mass_class": "terrestrial",
"surface_gravity": 1.02,
"orbital_period_days": 380.0,
"rotation_period_hours": 27.6,
"atmosphere": "standard",
"biome_summary": "cold_arid",
"hydrosphere": "liquid_water",
"economic_role": "mining",
"settlement_pattern": "urban_concentrated",
"industrial_corridor": "mining_refractories",
"notes": "primary inhabited world; wave_3 German heritage ('grey-stone'); 1-aperture dead_end; K0IV subgiant — amber-tinged light, late-afternoon quality all day; highland settlements, exposed sedimentary/metamorphic rock; Bergquarz dense grey-blue stone quarrying (three centuries continuous); Steinfeld Stone Cooperative governance (merged from three founding families); Tiefquarz Feinbearbeitung precision stone component division; equatorial valley agriculture under subgiant warmth"
},
{
"body_id": "GJ454-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": "sparse asteroid belt"
},
{
"body_id": "GJ454e",
"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": 2400.0,
"rotation_period_hours": 12.2,
"atmosphere": "gas_giant",
"biome_summary": null,
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "outer gas giant, one moon"
},
{
"body_id": "GJ454e-m1",
"proper_name": null,
"body_type": "moon",
"orbit_index": 1,
"parent_body_id": "GJ454e",
"inhabited": false,
"population": null,
"mass_class": "dwarf",
"surface_gravity": 0.12,
"orbital_period_days": 6.4,
"rotation_period_hours": 153.6,
"atmosphere": null,
"biome_summary": "frozen",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "icy moon, tidally locked"
},
{
"body_id": "GJ454f",
"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": 6200.0,
"rotation_period_hours": 34.8,
"atmosphere": "trace",
"biome_summary": "frozen",
"hydrosphere": "ice",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "outer icy rocky, uninhabited"
},
{
"body_id": "GJ454g",
"proper_name": null,
"body_type": "planet",
"orbit_index": 7,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "terrestrial",
"surface_gravity": 0.34,
"orbital_period_days": 14000.0,
"rotation_period_hours": 42.6,
"atmosphere": "trace",
"biome_summary": "frozen",
"hydrosphere": "ice",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "distant icy rocky, uninhabited"
},
{
"body_id": "GJ454h",
"proper_name": null,
"body_type": "planet",
"orbit_index": 8,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "terrestrial",
"surface_gravity": 0.26,
"orbital_period_days": 28000.0,
"rotation_period_hours": 50.2,
"atmosphere": "none",
"biome_summary": "frozen",
"hydrosphere": "ice",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "far outer icy rocky, uninhabited"
},
{
"body_id": "GJ454i",
"proper_name": null,
"body_type": "planet",
"orbit_index": 9,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "dwarf",
"surface_gravity": 0.12,
"orbital_period_days": 56000.0,
"rotation_period_hours": 28.4,
"atmosphere": "none",
"biome_summary": "frozen",
"hydrosphere": "ice",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "outermost dwarf, near oort boundary"
},
{
"body_id": "GJ454-oort",
"proper_name": null,
"body_type": "oort_cloud",
"orbit_index": 10,
"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": "GJ454-oort-S1",
"proper_name": "Steinfeld Horizon",
"orbits_body_id": "GJ454-oort",
"station_type": "horizon",
"population": 140,
"economic_role": "transit",
"docking_class": "major",
"has_gate_infrastructure": true,
"notes": "horizon station — 1 aperture; dead_end; connects Bergtor; Steinfeld Stone Cooperative operates transit; aggregate freight staging"
},
{
"station_id": "GJ454d-S1",
"proper_name": "Steinbruch",
"orbits_body_id": "GJ454d",
"station_type": "industrial",
"population": 820,
"economic_role": "mining",
"docking_class": "standard",
"has_gate_infrastructure": false,
"notes": "quarry operations orbital; aggregate grading and freight consolidation; Bergquarz bulk block and precision-cut stone staging; Tiefquarz Feinbearbeitung precision component workshop"
}
]
}
wiki/star-systems/GJ-454/index.md
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The K0IV subgiant classification produces a slightly unusual illumination regime for the planet — the evolved star's different luminosity profile compared to a standard K0V shifts the habitable zone outward and affects seasonal dynamics. The amber-light character described is a direct consequence of the subgiant's spectral output at this orbital distance. Wave_3 settlement at hop 8 reflects the deep corridor position — Steinfeld was reached as the inner corridor expanded and established the hop-by-hop chain through GJ 505A.
## 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 | `GJ454b` | — | planet | no | — | terrestrial | 0.46g | 32 | 18.8 | none | barren | — | — | — | — |
| 2 | `GJ454c` | — | planet | no | — | terrestrial | 0.72g | 160 | 22.4 | thin | hot_arid | — | — | — | — |
| 3 | `GJ454d` | Graustein | planet | yes | 28K | terrestrial | 1.02g | 380 | 27.6 | standard | cold_arid | liquid_water | mining | urban_concentrated | mining_refractories |
| 4 | `GJ454-belt` | — | asteroid_belt | no | — | — | — | — | — | — | — | — | — | — | — |
| 5 | `GJ454e` | — | gas_giant | no | — | — | — | 2400 | 12.2 | gas_giant | — | — | — | — | — |
| ↳ 5.1 | `GJ454e-m1` | — | moon | no | — | dwarf | 0.12g | 6 | 153.6 | — | frozen | — | — | — | — |
| 6 | `GJ454f` | — | planet | no | — | terrestrial | 0.44g | 6200 | 34.8 | trace | frozen | ice | — | — | — |
| 7 | `GJ454g` | — | planet | no | — | terrestrial | 0.34g | 14000 | 42.6 | trace | frozen | ice | — | — | — |
| 8 | `GJ454h` | — | planet | no | — | terrestrial | 0.26g | 28000 | 50.2 | none | frozen | ice | — | — | — |
| 9 | `GJ454i` | — | planet | no | — | dwarf | 0.12g | 56000 | 28.4 | none | frozen | ice | — | — | — |
| 10 | `GJ454-oort` | — | oort_cloud | no | — | — | — | — | — | — | — | — | — | — | — |
### Stations & Facilities
| ID | Name | Type | Orbits | Population | Economy | Governance | Docking | Gate | Districts |
|---|---|---|---|---|---|---|---|---|---|
| `GJ454-oort-S1` | Steinfeld Horizon | horizon | `GJ454-oort` | 140 | transit | — | major | yes | 1 |
| `GJ454d-S1` | Steinbruch | industrial | `GJ454d` | 820 | mining | — | standard | no | 1 |
## Topology
<!-- READ-ONLY — regenerated from star-map.json edges -->
- **Hop Distance from Gateway:** 8