Files
settled-reach/wiki/star-systems/GJ-19/index.md
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jpmschweitzerandClaude Opus 4.6 db241b88bd refactor(schema): rename biome_summary to planet_class (D-188)
"Biome" describes per-zone vegetation classification (Whittaker table).
"Planet class" describes overall planetary character. The conflation
caused the planet generator to misclassify ~270 bodies as barren.

Scope: systems.db column, schema SQL, Rust atlas code, wiki table
headers (Biome → Class), atlas proposal JSONs, all docs/decisions,
tooling scripts. Also normalizes atmosphere vocabulary (breathable →
standard) and expands planet class mapping to all 26 wiki values.
Unknown classes default to temperate for modder safety.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-04-06 17:10:35 +02:00

7.9 KiB

Solheim

GJ 19 | G-type | west_reach


System Profile

Star G2IV · 24.3 ly
Bodies 0 habitable · 4 inhabited
Gates 2 aperture · loop_member
Settlement wave_3
Industries fusion_fuel, metallic_ore, agricultural_produce, processed_food, refined_metals, hospitality, financial_services, legal_services
Exports processed_food, refined_metals, financial_services
Imports electronics, consumer_goods, medical_goods, chemicals
Population —

Supply Dependency

The star makes the system. GJ 19 is a G2 subgiant — evolved past the main sequence, luminous and warm in a way that almost nothing else along the western branch manages to be. Against a corridor of M-dwarfs and cool K-types, the light at Solheim is noticeably different: brighter skies, a habitable zone at comfortable distance, growing seasons long enough to support field agriculture without genetic modification. The Wave 3 founders noticed. The name they chose — Solheim, sun-home — was an accurate description of why they came.

Solheim is the western corridor's most productive agricultural system outside the very inner orbit. It exports grain, processed food products, and biological feedstocks to the loop's neighbors and to Caldwell Point for onward routing. GJ 506 (Dokkum), the loop's outward connection, receives regular food shipments that support Dokkum's more industrial population. The dependency is acknowledged; Solheim does not use it as leverage but is aware that it could.

The subgiant classification carries a caveat that the founding generation understood and the current population mostly does not think about: G2IV stars are leaving the main sequence. The habitable zone will shift inward as the star expands over the coming hundreds of millions of years. This is not a settlement-timescale concern. But the astronomical surveys filed with the Lattice Commission contain projections that the commission has flagged as informational and that no one in Solheim's governance has read.

Faction Notes

Solheim is one of the more prosperous mid-hop west_reach systems, and prosperity here has produced the thing prosperity often produces: a settled establishment that is comfortable with how things are and cautious about change. The elected council draws heavily from the major farming families who arrived in Wave 3 and have held land since. The council is genuinely democratic — elections happen, results are accepted — but the pool from which candidates emerge is narrow enough that the council's character has been consistent for six generations.

MVG has a supply relationship with Solheim's agricultural processing sector — not a manufacturing presence, but a long-term food supply contract that routes agricultural product to MVG's working-population systems in the inner corridor. The contract terms are not publicly known. What is known is that the terms have been renewed continuously for one hundred and twenty years and that the council has never opened them to competitive renegotiation. Whether this reflects a genuinely favorable arrangement or an incumbency relationship that has outlasted its utility is a question that does not get raised in council.

The Veil Institute has a small research station here — one of several across the corridor — studying the agricultural systems adapted to subgiant irradiation. The researchers are transient; the station is permanent; the data it generates is not shared with the local university.

Silence Topic

What Solheim does not examine: the terms of the MVG food supply contract and what those terms have cost the system in opportunity over a century of continuous renewal.

The contract predates most current council members' careers. The families who negotiated the original arrangement are still present — some are Perpetual-class, carrying the decision forward personally. The terms were favorable at inception. Whether they remain favorable at current food market prices, compared to what competitive bidding might generate, is an analysis the council has declined to commission. The families who negotiated the original deal are the same families who sit on the council. The analysis, if it were done, would constitute a judgment on their predecessors' work. Possibly their own.

Narrative Hook

The most productive agricultural system in this branch of the western corridor has been selling its output on a century-old contract to an MVG supply chain, and the founding families who negotiated that arrangement are still in council, still renewing it, and still unreachable on the subject of whether it could be renegotiated.

Calibration Note

G2IV is a subgiant — evolved past the main sequence, with a wider habitable zone and brighter output than any main-sequence star in this corridor band. The name "Solheim" specifically references the sun-quality of this star, which would be meaningless applied to a K or M-type. The Norwegian founding heritage is consistent with the Scandinavian cultural stream in the west_reach corridor. wave_3 settlement is correct for a system with this quality of habitable environment — the good conditions were identified early and settled deliberately. loop_member at hop 4 with an agricultural character makes this a supply node for the loop rather than a through-route industrial system. The MVG supply relationship extends the MVG corridor's economic reach through agricultural contracts rather than manufacturing, which is consistent with how the corridor operates in the inner hops.

Celestial Bodies

Orbit ID Name Type Inhabited Pop Mass Gravity Year (d) Day (h) Atmo Class Hydro Economy Settlement Industrial
1 GJ19b — planet no — terrestrial 0.54g 62 18.6 none barren — — — —
2 GJ19c — planet no — terrestrial 0.78g 240 24.2 thin hot_arid — — — —
3 GJ19d Åker planet yes 85M terrestrial 0.96g 750 25.4 standard temperate liquid_water agricultural dispersed agricultural_export
4 GJ19-belt — asteroid_belt no — — — — — — — — — — —
5 GJ19e — planet no — terrestrial 0.64g 1800 28.6 thin cold_arid — — — —
6 GJ19f — gas_giant no — — — 4800 10.4 gas_giant — — — — —
↳ 6.1 GJ19f-m1 — moon no — dwarf 0.14g 7 172.8 trace frozen — — — —
↳ 6.2 GJ19f-m2 — moon no — dwarf 0.09g 15 369.6 — barren — — — —
7 GJ19g — planet no — terrestrial 0.48g 12000 36.4 trace frozen ice — — —
8 GJ19h — planet no — terrestrial 0.38g 26000 44.8 trace frozen ice — — —
9 GJ19i — planet no — terrestrial 0.29g 52000 53.2 none frozen ice — — —
10 GJ19j — planet no — dwarf 0.12g 96000 30.6 none frozen ice — — —
11 GJ19-oort — oort_cloud no — — — — — — — — — — —

Stations & Facilities

ID Name Type Orbits Population Economy Governance Docking Gate Districts
GJ19-oort-S1 Solheim Horizon horizon GJ19-oort 840 transit — major yes 1
GJ19d-S1 Lystind research GJ19d 180 research — standard no 1
GJ19d-S2 Kornhavn commercial GJ19d 6K commercial — major no 1

Topology

  • Hop Distance from Gateway: 4
  • Adjacent Systems: GJ 664, GJ 506