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data(atlas): author GJ 807 (Grenzstein) — 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 12:38:17 +02:00
co-authored by Claude Opus 4.6
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docs/atlas/proposals/GJ807.json
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{
"system_id": "GJ 807",
"proper_name": "Grenzstein",
"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": "GJ807b",
"proper_name": null,
"body_type": "planet",
"orbit_index": 1,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "terrestrial",
"surface_gravity": 0.71,
"orbital_period_days": 130.0,
"rotation_period_hours": 3120.0,
"atmosphere": "none",
"biome_summary": "barren",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "inner rocky; tidally locked at 130-day period × 24 = 3120h rotation; hot dayside, extreme temperatures; no atmosphere; expanded K0IV illumination radius means this planet is in a wider inner orbit than comparable main-sequence systems"
},
{
"body_id": "GJ807c",
"proper_name": null,
"body_type": "planet",
"orbit_index": 2,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "terrestrial",
"surface_gravity": 0.66,
"orbital_period_days": 295.0,
"rotation_period_hours": 22.4,
"atmosphere": "thick",
"biome_summary": "arid",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "dry rocky world in inner-warm range; dense CO2 atmosphere; runaway greenhouse conditions; no settlement possible; surveyed early in Grenzstein founding period"
},
{
"body_id": "GJ807d",
"proper_name": "Pierrevert",
"body_type": "planet",
"orbit_index": 3,
"parent_body_id": null,
"inhabited": true,
"population": 8000,
"mass_class": "terrestrial",
"surface_gravity": 0.91,
"orbital_period_days": 620.0,
"rotation_period_hours": 27.6,
"atmosphere": "breathable",
"biome_summary": "temperate-cool",
"hydrosphere": "rivers-lakes",
"economic_role": "agricultural",
"settlement_pattern": "concentrated",
"industrial_corridor": "west_reach",
"notes": "primary inhabited world; K0IV subgiant outer habitable zone — warm but not intense illumination; slightly reddish stellar light produces vegetation with adapted photosynthetic systems, darker foliage; cooler seasonal cycle than Bout du Chemin; weather patterns require learning; two continents — primary settlement concentrated in temperate plains of main continent; secondary continent highlands contain surveyed geological anomalies (structured surface features found year 3, noted as inconsistent with natural formation, not followed up; second survey year 6 found features absent — both reports in coordinating council files, not forwarded); Wave 5 settlement ~40 years old, started with <2,000, now ~8,000 permanent residents; French-speaking, Bout du Chemin-heritage culture in early identity formation; heavy dependency on Bout du Chemin imports; exports minimal (agricultural raw product, early extraction material)"
},
{
"body_id": "GJ807d-1",
"proper_name": null,
"body_type": "moon",
"orbit_index": 1,
"parent_body_id": "GJ807d",
"inhabited": false,
"population": null,
"mass_class": "dwarf",
"surface_gravity": 0.07,
"orbital_period_days": 24.8,
"rotation_period_hours": 595.2,
"atmosphere": "none",
"biome_summary": "barren",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "Pierrevert's moon; tidally locked; prominent in early settlement sky observations and community calendar-making"
},
{
"body_id": "GJ807-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 main belt; surveyed in founding period; some early extraction work; no established operations — settlement-phase priorities precluded investment"
},
{
"body_id": "GJ807e",
"proper_name": null,
"body_type": "gas_giant",
"orbit_index": 5,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "gas_giant",
"surface_gravity": 2.6,
"orbital_period_days": 3500.0,
"rotation_period_hours": 9.8,
"atmosphere": "hydrogen-helium",
"biome_summary": null,
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "outer gas giant; muted ochre-grey banding; no extraction operations; outer system survey planned but not yet conducted"
},
{
"body_id": "GJ807e-1",
"proper_name": null,
"body_type": "moon",
"orbit_index": 1,
"parent_body_id": "GJ807e",
"inhabited": false,
"population": null,
"mass_class": "dwarf",
"surface_gravity": 0.10,
"orbital_period_days": 14.4,
"rotation_period_hours": 345.6,
"atmosphere": "none",
"biome_summary": "barren",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "inner gas giant moon; unsurveyed"
},
{
"body_id": "GJ807e-2",
"proper_name": null,
"body_type": "moon",
"orbit_index": 2,
"parent_body_id": "GJ807e",
"inhabited": false,
"population": null,
"mass_class": "dwarf",
"surface_gravity": 0.07,
"orbital_period_days": 31.6,
"rotation_period_hours": 758.4,
"atmosphere": "none",
"biome_summary": "ice",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "outer gas giant moon; icy; unsurveyed"
},
{
"body_id": "GJ807f",
"proper_name": null,
"body_type": "planet",
"orbit_index": 6,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "terrestrial",
"surface_gravity": 0.46,
"orbital_period_days": 9200.0,
"rotation_period_hours": 19.4,
"atmosphere": "none",
"biome_summary": "frozen",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "outer ice-rock world; unsurveyed in 40-year settlement period"
},
{
"body_id": "GJ807g",
"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": 22000.0,
"rotation_period_hours": 15.2,
"atmosphere": "none",
"biome_summary": "frozen",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "outer ice dwarf; trans-neptunian analog; entirely unsurveyed"
},
{
"body_id": "GJ807h",
"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": 48000.0,
"rotation_period_hours": 12.6,
"atmosphere": "none",
"biome_summary": "frozen",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "distant ice dwarf; scattered disk; entirely unsurveyed"
},
{
"body_id": "GJ807i",
"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": 92000.0,
"rotation_period_hours": 11.0,
"atmosphere": "none",
"biome_summary": "frozen",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "extreme outer ice dwarf; detached scattered disk; unknown until outer system survey"
},
{
"body_id": "GJ807-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; gate infrastructure sited here"
}
],
"stations": [
{
"station_id": "GJ807-oort-S1",
"proper_name": "Grenzstein Horizon",
"orbits_body_id": "GJ807-oort",
"station_type": "horizon",
"population": 400,
"economic_role": "transit",
"docking_class": "major",
"has_gate_infrastructure": true,
"notes": "two-aperture through-route horizon station; operated by small coordinating council caretaker team; connects Bout du Chemin inward and Yttermark outward; minimal permanent infrastructure for a 40-year settlement — functional but not established; community administrative reporting routed through Bout du Chemin's channel (Grenzstein's admin office has two staff, uses Bout du Chemin as proxy for Assembly reporting requirements)"
}
]
}
wiki/star-systems/GJ-807/index.md
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G-type header per the database classification. The READ-ONLY profile shows K0IV — a subgiant K-type, slightly evolved off the main sequence. The "G-type" header classification reflects the database grouping rather than the precise spectral type; a K0IV is at the warm end of the K range and could be grouped either way depending on classification convention. Wave_5 at hop 16 is at the current settlement frontier — this is one of the newest settled systems in the west_reach corridor. Through-route topology with two apertures: Bout du Chemin inward, Yttermark (GJ 529) outward.
## 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 | `GJ807b` | — | planet | no | — | terrestrial | 0.71g | 130 | 3120.0 | none | barren | — | — | — | — |
| 2 | `GJ807c` | — | planet | no | — | terrestrial | 0.66g | 295 | 22.4 | thick | arid | — | — | — | — |
| 3 | `GJ807d` | Pierrevert | planet | yes | 8K | terrestrial | 0.91g | 620 | 27.6 | breathable | temperate-cool | rivers-lakes | agricultural | concentrated | west_reach |
| ↳ 3.1 | `GJ807d-1` | — | moon | no | — | dwarf | 0.07g | 25 | 595.2 | none | barren | — | — | — | — |
| 4 | `GJ807-belt` | — | asteroid_belt | no | — | — | — | — | — | — | — | — | — | — | — |
| 5 | `GJ807e` | — | gas_giant | no | — | gas_giant | 2.60g | 3500 | 9.8 | hydrogen-helium | — | — | — | — | — |
| ↳ 5.1 | `GJ807e-1` | — | moon | no | — | dwarf | 0.10g | 14 | 345.6 | none | barren | — | — | — | — |
| ↳ 5.2 | `GJ807e-2` | — | moon | no | — | dwarf | 0.07g | 32 | 758.4 | none | ice | — | — | — | — |
| 6 | `GJ807f` | — | planet | no | — | terrestrial | 0.46g | 9200 | 19.4 | none | frozen | — | — | — | — |
| 7 | `GJ807g` | — | planet | no | — | dwarf | 0.08g | 22000 | 15.2 | none | frozen | — | — | — | — |
| 8 | `GJ807h` | — | planet | no | — | dwarf | 0.05g | 48000 | 12.6 | none | frozen | — | — | — | — |
| 9 | `GJ807i` | — | planet | no | — | dwarf | 0.04g | 92000 | 11.0 | none | frozen | — | — | — | — |
| 10 | `GJ807-oort` | — | oort_cloud | no | — | — | — | — | — | — | — | — | — | — | — |
### Stations & Facilities
| ID | Name | Type | Orbits | Population | Economy | Governance | Docking | Gate | Districts |
|---|---|---|---|---|---|---|---|---|---|
| `GJ807-oort-S1` | Grenzstein Horizon | horizon | `GJ807-oort` | 400 | transit | — | major | yes | 1 |
## Topology
<!-- READ-ONLY — regenerated from star-map.json edges -->
- **Hop Distance from Gateway:** 16