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data(atlas): author GJ 421B (Pedra Seca) — deep_frontier

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Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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jpmschweitzer
2026-04-03 11:43:12 +02:00
co-authored by Claude Opus 4.6
parent cce32dc244
commit 86e3b1e793
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docs/atlas/proposals/GJ421B.json
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{
"system_id": "GJ 421B",
"proper_name": "Pedra Seca",
"star_type": "K",
"spectral_class": "K7V",
"wiki_data": {
"habitable_count": 1,
"inhabited_count": 1,
"has_gas_giant": false,
"has_asteroid_belt": true,
"has_horizon_station": true,
"raw_bodies_line": null
},
"bodies": [
{
"body_id": "GJ421Bb",
"proper_name": null,
"body_type": "planet",
"orbit_index": 1,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "terrestrial",
"surface_gravity": 0.38,
"orbital_period_days": 15.0,
"rotation_period_hours": 360.0,
"atmosphere": "none",
"biome_summary": "barren",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "inner scorched rocky, tidally locked"
},
{
"body_id": "GJ421Bc",
"proper_name": "Serpa",
"body_type": "planet",
"orbit_index": 2,
"parent_body_id": null,
"inhabited": true,
"population": 800,
"mass_class": "terrestrial",
"surface_gravity": 0.84,
"orbital_period_days": 148.0,
"rotation_period_hours": 27.6,
"atmosphere": "thin",
"biome_summary": "cold_arid",
"hydrosphere": "liquid_water",
"economic_role": "agricultural",
"settlement_pattern": "urban_concentrated",
"industrial_corridor": null,
"notes": "primary inhabited world; wave_3 Southern African heritage (Afrikaans/Xhosa, Portuguese naming); 2-aperture through_route; K7V dim star; arid — shallow aquifers, seasonal seep-springs, measurable but rare precipitation; cistern and condensation collector network (built before permanent structures); community council governance (water allocation as primary function); water sales to deeper corridor travelers (charter provisions against profiteering); drought-resistant grains and root vegetables"
},
{
"body_id": "GJ421B-belt",
"proper_name": null,
"body_type": "asteroid_belt",
"orbit_index": 3,
"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": "GJ421Bd",
"proper_name": null,
"body_type": "planet",
"orbit_index": 4,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "terrestrial",
"surface_gravity": 0.50,
"orbital_period_days": 460.0,
"rotation_period_hours": 27.2,
"atmosphere": "trace",
"biome_summary": "frozen",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "outer rocky, frozen, uninhabited"
},
{
"body_id": "GJ421Be",
"proper_name": null,
"body_type": "planet",
"orbit_index": 5,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "terrestrial",
"surface_gravity": 0.40,
"orbital_period_days": 1300.0,
"rotation_period_hours": 30.4,
"atmosphere": "trace",
"biome_summary": "frozen",
"hydrosphere": "ice",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "outer icy rocky, uninhabited"
},
{
"body_id": "GJ421Bf",
"proper_name": null,
"body_type": "planet",
"orbit_index": 6,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "terrestrial",
"surface_gravity": 0.30,
"orbital_period_days": 3600.0,
"rotation_period_hours": 36.8,
"atmosphere": "trace",
"biome_summary": "frozen",
"hydrosphere": "ice",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "distant icy rocky, uninhabited"
},
{
"body_id": "GJ421Bg",
"proper_name": null,
"body_type": "planet",
"orbit_index": 7,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "dwarf",
"surface_gravity": 0.11,
"orbital_period_days": 9200.0,
"rotation_period_hours": 23.6,
"atmosphere": "none",
"biome_summary": "frozen",
"hydrosphere": "ice",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "outermost ice dwarf"
},
{
"body_id": "GJ421Bh",
"proper_name": null,
"body_type": "planet",
"orbit_index": 8,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "dwarf",
"surface_gravity": 0.08,
"orbital_period_days": 22000.0,
"rotation_period_hours": 18.4,
"atmosphere": "none",
"biome_summary": "frozen",
"hydrosphere": "ice",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "distant ice dwarf"
},
{
"body_id": "GJ421B-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": "GJ421B-oort-S1",
"proper_name": "Pedra Seca Horizon",
"orbits_body_id": "GJ421B-oort",
"station_type": "horizon",
"population": 40,
"economic_role": "transit",
"docking_class": "major",
"has_gate_infrastructure": true,
"notes": "horizon station — 2 apertures; through_route; connects Travessia and GJ 3943; water provisioning for deeper corridor travelers; last reliably watered stop before unsettled stretch"
}
]
}
wiki/star-systems/GJ-421B/index.md
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---
## 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 | `GJ421Bb` | — | planet | no | — | terrestrial | 0.38g | 15 | 360.0 | none | barren | — | — | — | — |
| 2 | `GJ421Bc` | Serpa | planet | yes | 800 | terrestrial | 0.84g | 148 | 27.6 | thin | cold_arid | liquid_water | agricultural | urban_concentrated | — |
| 3 | `GJ421B-belt` | — | asteroid_belt | no | — | — | — | — | — | — | — | — | — | — | — |
| 4 | `GJ421Bd` | — | planet | no | — | terrestrial | 0.50g | 460 | 27.2 | trace | frozen | — | — | — | — |
| 5 | `GJ421Be` | — | planet | no | — | terrestrial | 0.40g | 1300 | 30.4 | trace | frozen | ice | — | — | — |
| 6 | `GJ421Bf` | — | planet | no | — | terrestrial | 0.30g | 3600 | 36.8 | trace | frozen | ice | — | — | — |
| 7 | `GJ421Bg` | — | planet | no | — | dwarf | 0.11g | 9200 | 23.6 | none | frozen | ice | — | — | — |
| 8 | `GJ421Bh` | — | planet | no | — | dwarf | 0.08g | 22000 | 18.4 | none | frozen | ice | — | — | — |
| 9 | `GJ421B-oort` | — | oort_cloud | no | — | — | — | — | — | — | — | — | — | — | — |
### Stations & Facilities
| ID | Name | Type | Orbits | Population | Economy | Governance | Docking | Gate | Districts |
|---|---|---|---|---|---|---|---|---|---|
| `GJ421B-oort-S1` | Pedra Seca Horizon | horizon | `GJ421B-oort` | 40 | transit | — | major | yes | 1 |
## Topology
<!-- READ-ONLY — regenerated from star-map.json edges -->
- **Hop Distance from Gateway:** 16