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data(atlas): author GJ 542 (Kopparhytta) — 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 11:43:37 +02:00
co-authored by Claude Opus 4.6
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docs/atlas/proposals/GJ542.json
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{
"system_id": "GJ 542",
"proper_name": "Kopparhytta",
"star_type": "K",
"spectral_class": "K3V",
"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": "GJ542b",
"proper_name": null,
"body_type": "planet",
"orbit_index": 1,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "terrestrial",
"surface_gravity": 0.40,
"orbital_period_days": 22.0,
"rotation_period_hours": 17.4,
"atmosphere": "none",
"biome_summary": "barren",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "inner rocky, hot, uninhabited"
},
{
"body_id": "GJ542c",
"proper_name": "Kopparmark",
"body_type": "planet",
"orbit_index": 2,
"parent_body_id": null,
"inhabited": true,
"population": 36000,
"mass_class": "terrestrial",
"surface_gravity": 0.90,
"orbital_period_days": 200.0,
"rotation_period_hours": 25.8,
"atmosphere": "standard",
"biome_summary": "temperate",
"hydrosphere": "liquid_water",
"economic_role": "mining",
"settlement_pattern": "urban_concentrated",
"industrial_corridor": "mining_refractories",
"notes": "primary inhabited world; wave_4 Swedish heritage ('copper-ground'); 2-aperture loop_member; K3V yellow-orange light; single supercontinent with central copper-bearing mountain range; Kopparverken mining and smelting company (hundred-year planning horizon); Hammarby main town with artisanal metalwork workshops; Hammarby Craft Guild quality certification; refined copper ingot export; decorative copper-alloy metalwork (dark-patinated, geometric Nordic forms); processes Vindkast mineral ore via loop connection"
},
{
"body_id": "GJ542-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": "GJ542d",
"proper_name": null,
"body_type": "planet",
"orbit_index": 4,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "terrestrial",
"surface_gravity": 0.56,
"orbital_period_days": 560.0,
"rotation_period_hours": 27.6,
"atmosphere": "thin",
"biome_summary": "cold_arid",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "outer rocky, uninhabited"
},
{
"body_id": "GJ542e",
"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": 1800.0,
"rotation_period_hours": 11.4,
"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": "GJ542e-m1",
"proper_name": null,
"body_type": "moon",
"orbit_index": 1,
"parent_body_id": "GJ542e",
"inhabited": false,
"population": null,
"mass_class": "dwarf",
"surface_gravity": 0.11,
"orbital_period_days": 5.6,
"rotation_period_hours": 134.4,
"atmosphere": null,
"biome_summary": "frozen",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "icy moon, tidally locked"
},
{
"body_id": "GJ542f",
"proper_name": null,
"body_type": "planet",
"orbit_index": 6,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "terrestrial",
"surface_gravity": 0.42,
"orbital_period_days": 4600.0,
"rotation_period_hours": 33.4,
"atmosphere": "trace",
"biome_summary": "frozen",
"hydrosphere": "ice",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "outer icy rocky, uninhabited"
},
{
"body_id": "GJ542g",
"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": 10600.0,
"rotation_period_hours": 41.8,
"atmosphere": "trace",
"biome_summary": "frozen",
"hydrosphere": "ice",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "distant icy rocky, uninhabited"
},
{
"body_id": "GJ542h",
"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": 24000.0,
"rotation_period_hours": 49.2,
"atmosphere": "none",
"biome_summary": "frozen",
"hydrosphere": "ice",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "far outer icy rocky, uninhabited"
},
{
"body_id": "GJ542i",
"proper_name": null,
"body_type": "planet",
"orbit_index": 9,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "dwarf",
"surface_gravity": 0.11,
"orbital_period_days": 48000.0,
"rotation_period_hours": 27.4,
"atmosphere": "none",
"biome_summary": "frozen",
"hydrosphere": "ice",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "outermost dwarf, near oort boundary"
},
{
"body_id": "GJ542-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": "GJ542-oort-S1",
"proper_name": "Kopparhytta Horizon",
"orbits_body_id": "GJ542-oort",
"station_type": "horizon",
"population": 280,
"economic_role": "transit",
"docking_class": "major",
"has_gate_infrastructure": true,
"notes": "horizon station — 2 apertures; loop_member; connects Thorvaldsen's Circuit and Vindkast; Commission customs post (one permanent officer); copper ingot and mineral freight staging"
},
{
"station_id": "GJ542c-S1",
"proper_name": "Smältverk",
"orbits_body_id": "GJ542c",
"station_type": "industrial",
"population": 2400,
"economic_role": "manufacturing",
"docking_class": "major",
"has_gate_infrastructure": false,
"notes": "Kopparverken smelting and refining orbital; copper ingot production in standardized grades; processes Vindkast ore concentrate; artisanal metalwork export coordination"
}
]
}
wiki/star-systems/GJ-542/index.md
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The K3V stellar class supports the agricultural and industrial character described. The warm-orange light quality is consistent with mid-K luminosity and contributes to the sensory texture of the world — the way light falls on copper surfaces in the smelting district is a noted local aesthetic that the craftsworkers have internalized and that shows up in how they design patina finishes. Wave_4 settlement at hop 8 is consistent with the loop topology: the system was reachable through the developing west reach corridor chain.
## 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 | `GJ542b` | — | planet | no | — | terrestrial | 0.40g | 22 | 17.4 | none | barren | — | — | — | — |
| 2 | `GJ542c` | Kopparmark | planet | yes | 36K | terrestrial | 0.90g | 200 | 25.8 | standard | temperate | liquid_water | mining | urban_concentrated | mining_refractories |
| 3 | `GJ542-belt` | — | asteroid_belt | no | — | — | — | — | — | — | — | — | — | — | — |
| 4 | `GJ542d` | — | planet | no | — | terrestrial | 0.56g | 560 | 27.6 | thin | cold_arid | — | — | — | — |
| 5 | `GJ542e` | — | gas_giant | no | — | — | — | 1800 | 11.4 | gas_giant | — | — | — | — | — |
| ↳ 5.1 | `GJ542e-m1` | — | moon | no | — | dwarf | 0.11g | 6 | 134.4 | — | frozen | — | — | — | — |
| 6 | `GJ542f` | — | planet | no | — | terrestrial | 0.42g | 4600 | 33.4 | trace | frozen | ice | — | — | — |
| 7 | `GJ542g` | — | planet | no | — | terrestrial | 0.34g | 10600 | 41.8 | trace | frozen | ice | — | — | — |
| 8 | `GJ542h` | — | planet | no | — | terrestrial | 0.26g | 24000 | 49.2 | none | frozen | ice | — | — | — |
| 9 | `GJ542i` | — | planet | no | — | dwarf | 0.11g | 48000 | 27.4 | none | frozen | ice | — | — | — |
| 10 | `GJ542-oort` | — | oort_cloud | no | — | — | — | — | — | — | — | — | — | — | — |
### Stations & Facilities
| ID | Name | Type | Orbits | Population | Economy | Governance | Docking | Gate | Districts |
|---|---|---|---|---|---|---|---|---|---|
| `GJ542-oort-S1` | Kopparhytta Horizon | horizon | `GJ542-oort` | 280 | transit | — | major | yes | 1 |
| `GJ542c-S1` | Smältverk | industrial | `GJ542c` | 2K | manufacturing | — | major | no | 1 |
## Topology
<!-- READ-ONLY — regenerated from star-map.json edges -->
- **Hop Distance from Gateway:** 8