diff --git a/docs/atlas/proposals/GJ231.json b/docs/atlas/proposals/GJ231.json
new file mode 100644
index 000000000..d48d978c4
--- /dev/null
+++ b/docs/atlas/proposals/GJ231.json
@@ -0,0 +1,311 @@
+{
+  "system_id": "GJ 231",
+  "proper_name": "Thorvaldsen's Circuit",
+  "star_type": "G",
+  "spectral_class": "G5V",
+  "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": "GJ231b",
+      "proper_name": null,
+      "body_type": "planet",
+      "orbit_index": 1,
+      "parent_body_id": null,
+      "inhabited": false,
+      "population": null,
+      "mass_class": "terrestrial",
+      "surface_gravity": 0.48,
+      "orbital_period_days": 42.0,
+      "rotation_period_hours": 19.4,
+      "atmosphere": "none",
+      "biome_summary": "barren",
+      "hydrosphere": null,
+      "economic_role": null,
+      "settlement_pattern": null,
+      "industrial_corridor": null,
+      "notes": "inner rocky, hot, uninhabited"
+    },
+    {
+      "body_id": "GJ231c",
+      "proper_name": null,
+      "body_type": "planet",
+      "orbit_index": 2,
+      "parent_body_id": null,
+      "inhabited": false,
+      "population": null,
+      "mass_class": "terrestrial",
+      "surface_gravity": 0.72,
+      "orbital_period_days": 140.0,
+      "rotation_period_hours": 24.8,
+      "atmosphere": "thin",
+      "biome_summary": "hot_arid",
+      "hydrosphere": null,
+      "economic_role": null,
+      "settlement_pattern": null,
+      "industrial_corridor": null,
+      "notes": "hot inner rocky, desiccated, uninhabited"
+    },
+    {
+      "body_id": "GJ231d",
+      "proper_name": "Britta's Landing",
+      "body_type": "planet",
+      "orbit_index": 3,
+      "parent_body_id": null,
+      "inhabited": true,
+      "population": 35000000,
+      "mass_class": "terrestrial",
+      "surface_gravity": 0.92,
+      "orbital_period_days": 310.0,
+      "rotation_period_hours": 25.6,
+      "atmosphere": "standard",
+      "biome_summary": "temperate",
+      "hydrosphere": "liquid_water",
+      "economic_role": "research",
+      "settlement_pattern": "urban_concentrated",
+      "industrial_corridor": "research_export",
+      "notes": "primary inhabited world; wave_2 Danish survey heritage (Maj-Britt Thorvaldsen); 2-aperture loop_member; G5V warm light; two economic reinventions (mining → refinery → education); technical education hub for outer corridor extraction engineering; remnant refinery sector at reduced capacity; three-bloc cooperative council governance; Compact of Westphalia formal member (institutional recognition framework)"
+    },
+    {
+      "body_id": "GJ231-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": "depleted inner mineral belt; former extraction zone, now exhausted"
+    },
+    {
+      "body_id": "GJ231e",
+      "proper_name": null,
+      "body_type": "planet",
+      "orbit_index": 5,
+      "parent_body_id": null,
+      "inhabited": false,
+      "population": null,
+      "mass_class": "terrestrial",
+      "surface_gravity": 0.58,
+      "orbital_period_days": 920.0,
+      "rotation_period_hours": 27.8,
+      "atmosphere": "thin",
+      "biome_summary": "cold_arid",
+      "hydrosphere": null,
+      "economic_role": null,
+      "settlement_pattern": null,
+      "industrial_corridor": null,
+      "notes": "outer rocky, uninhabited"
+    },
+    {
+      "body_id": "GJ231f",
+      "proper_name": null,
+      "body_type": "gas_giant",
+      "orbit_index": 6,
+      "parent_body_id": null,
+      "inhabited": false,
+      "population": null,
+      "mass_class": null,
+      "surface_gravity": null,
+      "orbital_period_days": 2800.0,
+      "rotation_period_hours": 10.8,
+      "atmosphere": "gas_giant",
+      "biome_summary": null,
+      "hydrosphere": null,
+      "economic_role": null,
+      "settlement_pattern": null,
+      "industrial_corridor": null,
+      "notes": "outer gas giant, two moons"
+    },
+    {
+      "body_id": "GJ231f-m1",
+      "proper_name": null,
+      "body_type": "moon",
+      "orbit_index": 1,
+      "parent_body_id": "GJ231f",
+      "inhabited": false,
+      "population": null,
+      "mass_class": "dwarf",
+      "surface_gravity": 0.13,
+      "orbital_period_days": 6.4,
+      "rotation_period_hours": 153.6,
+      "atmosphere": "trace",
+      "biome_summary": "frozen",
+      "hydrosphere": null,
+      "economic_role": null,
+      "settlement_pattern": null,
+      "industrial_corridor": null,
+      "notes": "icy moon, tidally locked"
+    },
+    {
+      "body_id": "GJ231f-m2",
+      "proper_name": null,
+      "body_type": "moon",
+      "orbit_index": 2,
+      "parent_body_id": "GJ231f",
+      "inhabited": false,
+      "population": null,
+      "mass_class": "dwarf",
+      "surface_gravity": 0.08,
+      "orbital_period_days": 13.8,
+      "rotation_period_hours": 331.2,
+      "atmosphere": null,
+      "biome_summary": "barren",
+      "hydrosphere": null,
+      "economic_role": null,
+      "settlement_pattern": null,
+      "industrial_corridor": null,
+      "notes": "small rocky moon, tidally locked"
+    },
+    {
+      "body_id": "GJ231g",
+      "proper_name": null,
+      "body_type": "planet",
+      "orbit_index": 7,
+      "parent_body_id": null,
+      "inhabited": false,
+      "population": null,
+      "mass_class": "terrestrial",
+      "surface_gravity": 0.46,
+      "orbital_period_days": 7200.0,
+      "rotation_period_hours": 35.4,
+      "atmosphere": "trace",
+      "biome_summary": "frozen",
+      "hydrosphere": "ice",
+      "economic_role": null,
+      "settlement_pattern": null,
+      "industrial_corridor": null,
+      "notes": "outer icy rocky, uninhabited"
+    },
+    {
+      "body_id": "GJ231h",
+      "proper_name": null,
+      "body_type": "planet",
+      "orbit_index": 8,
+      "parent_body_id": null,
+      "inhabited": false,
+      "population": null,
+      "mass_class": "terrestrial",
+      "surface_gravity": 0.36,
+      "orbital_period_days": 15800.0,
+      "rotation_period_hours": 43.6,
+      "atmosphere": "trace",
+      "biome_summary": "frozen",
+      "hydrosphere": "ice",
+      "economic_role": null,
+      "settlement_pattern": null,
+      "industrial_corridor": null,
+      "notes": "distant icy rocky, uninhabited"
+    },
+    {
+      "body_id": "GJ231i",
+      "proper_name": null,
+      "body_type": "planet",
+      "orbit_index": 9,
+      "parent_body_id": null,
+      "inhabited": false,
+      "population": null,
+      "mass_class": "dwarf",
+      "surface_gravity": 0.12,
+      "orbital_period_days": 34000.0,
+      "rotation_period_hours": 30.2,
+      "atmosphere": "none",
+      "biome_summary": "frozen",
+      "hydrosphere": "ice",
+      "economic_role": null,
+      "settlement_pattern": null,
+      "industrial_corridor": null,
+      "notes": "outermost dwarf, near oort boundary"
+    },
+    {
+      "body_id": "GJ231j",
+      "proper_name": null,
+      "body_type": "planet",
+      "orbit_index": 10,
+      "parent_body_id": null,
+      "inhabited": false,
+      "population": null,
+      "mass_class": "dwarf",
+      "surface_gravity": 0.10,
+      "orbital_period_days": 62000.0,
+      "rotation_period_hours": 23.8,
+      "atmosphere": "none",
+      "biome_summary": "frozen",
+      "hydrosphere": "ice",
+      "economic_role": null,
+      "settlement_pattern": null,
+      "industrial_corridor": null,
+      "notes": "distant ice dwarf"
+    },
+    {
+      "body_id": "GJ231-oort",
+      "proper_name": null,
+      "body_type": "oort_cloud",
+      "orbit_index": 11,
+      "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": "GJ231-oort-S1",
+      "proper_name": "Thorvaldsen's Circuit Horizon",
+      "orbits_body_id": "GJ231-oort",
+      "station_type": "horizon",
+      "population": 580,
+      "economic_role": "transit",
+      "docking_class": "major",
+      "has_gate_infrastructure": true,
+      "notes": "horizon station — 2 apertures; loop_member; connects Rødvik and Kopparhytta"
+    },
+    {
+      "station_id": "GJ231d-S1",
+      "proper_name": "Højskolen",
+      "orbits_body_id": "GJ231d",
+      "station_type": "research",
+      "population": 4800,
+      "economic_role": "research",
+      "docking_class": "standard",
+      "has_gate_infrastructure": false,
+      "notes": "technical education institution; deep extraction engineering curriculum; outer corridor student enrollment; Compact institutional recognition (not Assembly accredited)"
+    },
+    {
+      "station_id": "GJ231d-S2",
+      "proper_name": "Smelteriet",
+      "orbits_body_id": "GJ231d",
+      "station_type": "industrial",
+      "population": 2400,
+      "economic_role": "manufacturing",
+      "docking_class": "major",
+      "has_gate_infrastructure": false,
+      "notes": "remnant heavy ore refinery; reduced capacity; aging processing units nearing end-of-certified-life; imports raw ore from Kopparhytta"
+    }
+  ]
+}
diff --git a/wiki/star-systems/GJ-231/index.md b/wiki/star-systems/GJ-231/index.md
index b6749d302..59d637a86 100644
--- a/wiki/star-systems/GJ-231/index.md
+++ b/wiki/star-systems/GJ-231/index.md
@@ -50,6 +50,33 @@ The engineering school that Thorvaldsen's Circuit built from its own exhausted m
 
 `wave_2` at hop 7 is consistent with deliberate settlement targeting a known mineral deposit, which the survey records identified and the founding consortium moved on quickly. The G5V classification means Thorvaldsen's Circuit is one of the warmer, more hospitable systems on the corridor's outer branch, which is why it became an educational hub rather than simply closing when mining ceased — the quality of life is high enough to attract and retain people who have options. `loop_member` topology is accurate. The economic reinvention history — mining to refinery to education — is internally consistent with the timeline and the geological reality of a system settled for ore that depleted.
 
+## 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 | `GJ231b` | — | planet | no | — | terrestrial | 0.48g | 42 | 19.4 | none | barren | — | — | — | — |
+| 2 | `GJ231c` | — | planet | no | — | terrestrial | 0.72g | 140 | 24.8 | thin | hot_arid | — | — | — | — |
+| 3 | `GJ231d` | Britta's Landing | planet | yes | 35M | terrestrial | 0.92g | 310 | 25.6 | standard | temperate | liquid_water | research | urban_concentrated | research_export |
+| 4 | `GJ231-belt` | — | asteroid_belt | no | — | — | — | — | — | — | — | — | — | — | — |
+| 5 | `GJ231e` | — | planet | no | — | terrestrial | 0.58g | 920 | 27.8 | thin | cold_arid | — | — | — | — |
+| 6 | `GJ231f` | — | gas_giant | no | — | — | — | 2800 | 10.8 | gas_giant | — | — | — | — | — |
+| ↳ 6.1 | `GJ231f-m1` | — | moon | no | — | dwarf | 0.13g | 6 | 153.6 | trace | frozen | — | — | — | — |
+| ↳ 6.2 | `GJ231f-m2` | — | moon | no | — | dwarf | 0.08g | 14 | 331.2 | — | barren | — | — | — | — |
+| 7 | `GJ231g` | — | planet | no | — | terrestrial | 0.46g | 7200 | 35.4 | trace | frozen | ice | — | — | — |
+| 8 | `GJ231h` | — | planet | no | — | terrestrial | 0.36g | 15800 | 43.6 | trace | frozen | ice | — | — | — |
+| 9 | `GJ231i` | — | planet | no | — | dwarf | 0.12g | 34000 | 30.2 | none | frozen | ice | — | — | — |
+| 10 | `GJ231j` | — | planet | no | — | dwarf | 0.10g | 62000 | 23.8 | none | frozen | ice | — | — | — |
+| 11 | `GJ231-oort` | — | oort_cloud | no | — | — | — | — | — | — | — | — | — | — | — |
+
+### Stations & Facilities
+
+| ID | Name | Type | Orbits | Population | Economy | Governance | Docking | Gate | Districts |
+|---|---|---|---|---|---|---|---|---|---|
+| `GJ231-oort-S1` | Thorvaldsen's Circuit Horizon | horizon | `GJ231-oort` | 580 | transit | — | major | yes | 1 |
+| `GJ231d-S1` | Højskolen | research | `GJ231d` | 4K | research | — | standard | no | 1 |
+| `GJ231d-S2` | Smelteriet | industrial | `GJ231d` | 2K | manufacturing | — | major | no | 1 |
+
 ## Topology
 <!-- READ-ONLY — regenerated from star-map.json edges -->
 - **Hop Distance from Gateway:** 7