Files
settled-reach/wiki/star-systems/GJ-34A/index.md
T
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

5.8 KiB

Tanegashima

GJ 34A | G-type | north_reach


System Profile

Star G0V SB · 19.4 ly
Bodies 1 habitable · 3 inhabited
Gates 3 aperture · junction
Settlement wave_4
Industries fusion_fuel, metallic_ore, financial_services, insurance, legal_services
Exports financial_services, legal_services
Imports processed_food, electronics, consumer_goods, medical_goods, refined_metals, chemicals
Population —

Supply Dependency

Tanegashima is a net importer of food and heavy machinery, exporting precision components and technical expertise in return. The system's economic anchor is advanced fabrication: Wave 4 settlers who came through the east_reach gate network brought manufacturing traditions and established the first modular shipyard in this band of the north_reach. Gate Corporation contracts for hull components and gate maintenance sub-assemblies have kept those yards viable for a century. Core-direction supply (GJ 845) provides raw stock and transits food from Puerto Rivera and the inner agricultural systems; New Ballarat (GJ 667A) provides transit continuity to the outer systems.

Faction Notes

Tanegashima's governance structure is an Assembly of Technical Delegates — representatives elected by professional guild rather than by geography or population. Each licensed trade guild nominates candidates; all resident adults vote across guilds. The result is a government that looks and sounds like a meritocracy, debates endlessly in technical terms, and produces policy that reliably advantages the established guilds at the expense of newer arrivals. The Concord Assembly finds this arrangement procedurally confusing but does not object to it so long as assessments are paid on schedule, which they are.

The Lattice Commission has a small monitoring station here, less for enforcement than for technical interest: the spectroscopic binary nature of the star produces unusual lattice-propagation conditions that Commission researchers have been studying for several decades.

Silence Topic

The system's fabrication guilds have been quietly negotiating a long-term component supply contract with a buyer whose identity has not been disclosed in any public filing. The scale of the contract — if the figures that have leaked to guild floor representatives are accurate — exceeds Tanegashima's current production capacity by a factor of three. No one knows who the buyer is, what the components are for, or where they will ultimately go. The guild leadership says it is commercially sensitive. The workers want to know whether they are building something they would want built.

Narrative Hook

Tanegashima makes things without asking what they are for, and has made enough money doing so that questioning the arrangement has become socially difficult.

Calibration Note

Wave_4 settlement at hop 3 reflects corporate-origin activation: the fabrication potential was identified late because early survey teams were looking for habitable worlds, not industrial sites. The east_reach heritage (Japanese founding wave) is an Early Arrival exception — a Syndic logistics executive routed the founding contract through her own cultural network, producing a Japanese-heritage founding community in the middle of the Commonwealth corridor. After four generations, the system is thoroughly cross-corridor: the founding heritage survives in naming conventions, some architectural vocabulary, and the guild governance model, but the population is demographically mixed.

Topology

  • Hop Distance from Gateway: 3
  • Adjacent Systems: GJ 473B, GJ 667A, GJ 845

Celestial Bodies

Orbit ID Name Type Inhabited Pop Mass Gravity Year (d) Day (h) Atmo Class Hydro Economy Settlement Industrial
1 GJ34Ab — planet no — terrestrial 0.28g 20 480.0 none barren none — — —
2 GJ34Ac — planet no — terrestrial 0.60g 80 1920.0 toxic barren none — — —
3 GJ34Ad Kanashiro planet yes 1.8B terrestrial 0.92g 350 23.5 standard temperate ocean manufacturing urban_concentrated —
↳ 3.1 GJ34Ad-1 — moon no — dwarf 0.07g 16 384.0 none barren none — — —
4 GJ34Ae — planet no — terrestrial 0.50g 580 19.0 thin arid none — — —
5 GJ34Af — planet no — terrestrial 0.44g 900 17.0 thin frozen rivers — — —
6 GJ34Ag — planet no — terrestrial 0.36g 1400 15.5 none frozen ice — — —
7 GJ34A-belt — asteroid_belt no — — — — — — — — — — —
8 GJ34Ah — gas_giant no — gas_giant — 3000 10.0 dense — — — — —
↳ 8.1 GJ34Ah-1 — moon no — dwarf 0.09g 4 96.0 none barren none — — —
↳ 8.2 GJ34Ah-2 — moon no — dwarf 0.06g 10 240.0 none frozen ice — — —
9 GJ34A-oort — oort_cloud no — — — — — — — — — — —

Stations & Facilities

ID Name Type Orbits Population Economy Governance Docking Gate Districts
GJ34A-oort-S1 Horizon Station horizon GJ34A-oort — transit — major yes 1
GJ34Ad-S1 Tsurumi Station industrial GJ34Ad 30M manufacturing — major no 1