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data(atlas): author GJ 754 (Miryang) — east_reach

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Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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jpmschweitzer
2026-03-29 13:57:59 +02:00
co-authored by Claude Opus 4.6
parent 855444f891
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docs/atlas/proposals/GJ754.json
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{
"system_id": "GJ 754",
"proper_name": "Miryang",
"star_type": "M",
"spectral_class": "M4.5",
"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": "GJ754b",
"proper_name": null,
"body_type": "planet",
"orbit_index": 1,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "terrestrial",
"surface_gravity": 0.29,
"orbital_period_days": 4.4,
"rotation_period_hours": 105.6,
"atmosphere": "none",
"biome_summary": "barren",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "inner scorched rocky, tidally locked"
},
{
"body_id": "GJ754c",
"proper_name": "Miryang",
"body_type": "planet",
"orbit_index": 2,
"parent_body_id": null,
"inhabited": true,
"population": 240000,
"mass_class": "terrestrial",
"surface_gravity": 0.80,
"orbital_period_days": 14.8,
"rotation_period_hours": 355.2,
"atmosphere": "standard",
"biome_summary": "temperate_terminator",
"hydrosphere": "liquid_water",
"economic_role": "agricultural",
"settlement_pattern": "dispersed",
"industrial_corridor": "agricultural_export",
"notes": "primary inhabited world; tidally locked; wave_3 Korean heritage; 2-aperture through_route; agricultural exporter — enclosed horticultural complexes, consistent food surplus; syndicate council / cooperative governance; food flows coreward through Bridgepoint; water reclamation infrastructure collectively managed"
},
{
"body_id": "GJ754-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": "GJ754d",
"proper_name": null,
"body_type": "planet",
"orbit_index": 4,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "terrestrial",
"surface_gravity": 0.43,
"orbital_period_days": 88.0,
"rotation_period_hours": 19.8,
"atmosphere": "thin",
"biome_summary": "frozen",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "outer rocky, cold, uninhabited"
},
{
"body_id": "GJ754e",
"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": 380.0,
"rotation_period_hours": 12.8,
"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": "GJ754e-m1",
"proper_name": null,
"body_type": "moon",
"orbit_index": 1,
"parent_body_id": "GJ754e",
"inhabited": false,
"population": null,
"mass_class": "dwarf",
"surface_gravity": 0.10,
"orbital_period_days": 5.2,
"rotation_period_hours": 124.8,
"atmosphere": null,
"biome_summary": "frozen",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "small icy moon, tidally locked"
},
{
"body_id": "GJ754f",
"proper_name": null,
"body_type": "planet",
"orbit_index": 6,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "terrestrial",
"surface_gravity": 0.35,
"orbital_period_days": 1200.0,
"rotation_period_hours": 30.6,
"atmosphere": "trace",
"biome_summary": "frozen",
"hydrosphere": "ice",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "outer icy rocky, uninhabited"
},
{
"body_id": "GJ754g",
"proper_name": null,
"body_type": "planet",
"orbit_index": 7,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "terrestrial",
"surface_gravity": 0.26,
"orbital_period_days": 3100.0,
"rotation_period_hours": 38.4,
"atmosphere": "trace",
"biome_summary": "frozen",
"hydrosphere": "ice",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "distant icy rocky, uninhabited"
},
{
"body_id": "GJ754h",
"proper_name": null,
"body_type": "planet",
"orbit_index": 8,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "dwarf",
"surface_gravity": 0.11,
"orbital_period_days": 7200.0,
"rotation_period_hours": 24.4,
"atmosphere": "none",
"biome_summary": "frozen",
"hydrosphere": "ice",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "outermost ice dwarf"
},
{
"body_id": "GJ754-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": "GJ754-oort-S1",
"proper_name": "Miryang Horizon",
"orbits_body_id": "GJ754-oort",
"station_type": "horizon",
"population": 940,
"economic_role": "transit",
"docking_class": "major",
"has_gate_infrastructure": true,
"notes": "horizon station — 2 apertures; through_route; connects Bridgepoint and Yeongwol; agricultural freight staging"
}
]
}
wiki/star-systems/GJ-754/index.md
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`wave_3` at `hop 5` as a `through_route` is standard mid-corridor settlement. Korean-heritage founding community is consistent with the east_reach corridor — Korean cooperative agricultural traditions are well-documented in the corridor's wave_3 expansion, and the syndicate-council governance reflects that heritage's institutional forms. The M4.5 primary is consistent with enclosed-habitat agriculture rather than open-surface cultivation; M-dwarf agricultural systems in the east_reach have consistently developed horticultural rather than field-crop economies, and Miryang's enclosed approach allows it to maintain stable yields despite the star's low-luminosity profile.
## 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 | `GJ754b` | — | planet | no | — | terrestrial | 0.29g | 4 | 105.6 | none | barren | — | — | — | — |
| 2 | `GJ754c` | Miryang | planet | yes | 240K | terrestrial | 0.80g | 15 | 355.2 | standard | temperate_terminator | liquid_water | agricultural | dispersed | agricultural_export |
| 3 | `GJ754-belt` | — | asteroid_belt | no | — | — | — | — | — | — | — | — | — | — | — |
| 4 | `GJ754d` | — | planet | no | — | terrestrial | 0.43g | 88 | 19.8 | thin | frozen | — | — | — | — |
| 5 | `GJ754e` | — | gas_giant | no | — | — | — | 380 | 12.8 | gas_giant | — | — | — | — | — |
| ↳ 5.1 | `GJ754e-m1` | — | moon | no | — | dwarf | 0.10g | 5 | 124.8 | — | frozen | — | — | — | — |
| 6 | `GJ754f` | — | planet | no | — | terrestrial | 0.35g | 1200 | 30.6 | trace | frozen | ice | — | — | — |
| 7 | `GJ754g` | — | planet | no | — | terrestrial | 0.26g | 3100 | 38.4 | trace | frozen | ice | — | — | — |
| 8 | `GJ754h` | — | planet | no | — | dwarf | 0.11g | 7200 | 24.4 | none | frozen | ice | — | — | — |
| 9 | `GJ754-oort` | — | oort_cloud | no | — | — | — | — | — | — | — | — | — | — | — |
### Stations & Facilities
| ID | Name | Type | Orbits | Population | Economy | Governance | Docking | Gate | Districts |
|---|---|---|---|---|---|---|---|---|---|
| `GJ754-oort-S1` | Miryang Horizon | horizon | `GJ754-oort` | 940 | transit | — | major | yes | 1 |
## Topology
<!-- READ-ONLY — regenerated from star-map.json edges -->
- **Hop Distance from Gateway:** 5