This archive tracks four layers. A record present in 2 of them (M41, IND) is silent in the rest, and says so.
The Horus HeresyM30–M31
[RECORD LOST]
No record for this location in The Horus Heresy.
Age of the ImperiumM32–M40
[RECORD LOST]
No record for this location in Age of the Imperium.
The 41st Millenniumpre-Rift
ork
Ork world; birthplace of Ghazghkull Thraka, abandoned c. 941.M41
Once the Dark Age colony Urokleas, then an Imperial world taken by the Orks in mid-M32 and cut off when the warp tides left the Zornian System. Desert and mountain at the equator, freezing to tundra north and south, with green auroras, twin moons and an orbit of abandoned Imperial stations; its winters stretch for years as the star declines. Six clans hold it: Ugrak's Goffs, Dregmek's Deathskulls in the city-sized camp of Rustspike, Shazfrag's Evil Sunz, Snazdakka's Bad Moons, Grudbolg's Snakebites and Straturgum's Blood Axes, watched by a Dark Angels monitoring sanctum on Rukblud Peak. Here Ghazghkull is spawned into a blizzard, shot through the skull, rebuilt by Grotsnik, and unites the clans before the exodus aboard the space hulk Wurld Killa, in Ghazghkull Thraka: Prophet of the Waaagh!.
Era Indomituspost-Rift
none
Dead world; its star has become a red giant
Left frozen and inhospitable to life after the Zornian star died and swelled into a red giant; the Orks who did not leave aboard the Wurld Killa died with it.
Position
Map frame: 298, 413 in the archive's 0–1000 disk space (core at 500, 500).
Distance from the core: 220 units ≈ 23.4k light years, north-west of the galactic core.
Height above the disk plane: 8.4 units — invented thin-disk jitter, deterministic per record. No published source gives any location a z coordinate.
System: Zornian System
Books set here
1 title in the reading tracker touches this record, 1 of them as a primary location. Titles link out to the tracker.
Every fact in this record, and where it came from. Editorial derivations say so.
identityhigh
wh40k.lexicanum.com/wiki/Urk (read as raw wikitext through a browser, fetch via index.php?action=raw, 2026-10-05; the rendered page returned Cloudflare 522/520): 'Urk was an Ork World and homeworld of the Ork Warlord Ghazghkull Mag Uruk Thraka', formerly Urokleas; the clans, Gogduf, Rukblud Peak, Rustspike, twin moons and abandoned stations are cited to Ghazghkull Thraka: Prophet of the Waaagh! Chapters One to Six and Interrogations V and VI. NAME-COLLISION CHECK: no index record uses the id or label; Lexicanum has one Urk article.
classmedium
'ice' from what the page says it LOOKS like in the book's years: the equator 'largely desert with mountain ranges', the climate 'quickly cooled to frozen regions in the northern and southern hemispheres', stormy winters lasting years and becoming permanent as the star declined, and Ghazghkull spawned 'into a blizzard in the tundra wastes' (Lexicanum Urk, Overview; Ghazghkull_Mag_Uruk_Thraka, Origins, Chapter One). The infobox's 'Ork World / Dead World' are ownership and fate tags, not a look, so neither is copied (ADDING-A-BOOK Step 5a2). The era rule: m41 is the frozen living world the novel's first half is set on; indomitus carries eras.indomitus.class 'dead' because by then the star has died ('left frozen and inhospitable to life').
segmentumhigh
wh40k.lexicanum.com/wiki/Urk infobox: Segmentum 'Segmentum Solar', cited to Waaagh! Ghazghkull: A Codex: Orks Supplement p. 6 and the Warhammer 40,000 5th Edition Rulebook map p. 160; the article is filed under Category:Segmentum Solar. https://wh40k.lexicanum.com/wiki/Zornian_System (raw wikitext, 2026-10-05): 'a star system located on the galactic-north border of the Segmentum Solar', citing the same 5th Edition map.
gposlow
inferred: the segmentum and a bearing are published (Zornian System 'on the galactic-north border of the Segmentum Solar', Lexicanum Zornian_System citing the 5th Edition rulebook map p. 160); no coordinate is. In this frame north is lower y (Cadia [232,348] lies north of Terra), and regions.json's Solar boundary runs along y 400-406 between x 284 and 347, so Urk is placed just inside that northern edge at [298,413]; Fenris and Sancour are the nearest markers at 42.7 units. Lexicanum's infobox also carries a map cross (Galaxy-Rift-Solar.jpg, X 86, Y 82) whose frame is not published, so it is not used. Z 8.4 is the zPolicy value (compute-z.mjs urk 298 413).
systemIdhigh
'zornian': Lexicanum Urk infobox System 'Zornian System' (Waaagh! Ghazghkull supplement p. 6). systems/zornian.json is authored as a TRUNCATED survey because Urk is the PRIMARY setting of the novel's first half.
erasmedium
m41: Ghazghkull's time on Urk is late M41, ending in the exodus before the Second War for Armageddon in 941.M41 (Lexicanum Urk, Ghazghkull Thraka section; Ghazghkull_Mag_Uruk_Thraka, Exodus and Second War for Armageddon, citing Codex: Armageddon p. 25). Allegiance 'ork' throughout. indomitus: the star 'died and turned into a red giant' (Lexicanum Urk lead, Waaagh! Ghazghkull supplement p. 6); allegiance 'none' because no permitted page puts anyone there afterwards. hh and aoi carry nothing: the Great Crusade colony and the mid-M32 conquest are history the shelf does not visit.