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
imperium
Hive world; destroyed in 999.M41
An Imperial hive world of billions, home to the Haephastus Hive and the infamous Schola Progenium complex called The Claw, until a massive comet struck it in 999.M41 and destroyed its hives in moments. Imperial tithe ships that came to claim a billion Guardsmen for the Enceladus Crusade found one survivor, the youth Zane Mortensen.
Era Indomituspost-Rift
none
Dead world; former hive world
A dead world since the impact of 999.M41, its tithe grade struck to none. Redemption Corps returns to it in its commander's memory: Mortensen's last timed run across its surface, the impact, and the long wait among survivors who died around him one by one.
Position
Map frame: 822.6, 790.9 in the archive's 0–1000 disk space (core at 500, 500).
Distance from the core: 434 units ≈ 46.2k light years, south-east of the galactic core.
Height above the disk plane: -8.9 units — invented thin-disk jitter, deterministic per record. No published source gives any location a z coordinate.
System: Gomorrah System
Books set here
1 title in the reading tracker touches this record. 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/Gomorrah (read directly in a browser on 2026-10-02): 'a former Imperial Hive World, that was the Homeworld of the Tempestor Prime Zane Mortensen'; the Haephastus Hive, The Claw, the comet in 999.M41, the tithe ships of the Enceladus Crusade and the single survivor, cited to Redemption Corps (Novel), ch. 3 s. 3; infobox Class 'Dead World, former Hive World', Population 'formerly billions', Tithe Grade None. Corroborated by Zane_Mortensen (Prologue, ch. 1 s. 1, ch. 3 s. 3) and Enceladus_Crusade (ch. 3 s. 3). NAME-COLLISION CHECK: no other index record uses the name, and Lexicanum's Gomorrah article carries no disambiguation notice.
segmentumhigh
null: Lexicanum Gomorrah's infobox has Segmentum, Sector and System all 'Unknown' and the page is filed 'Segmentum Unknown'.
classmedium
'dead' as the record's default and for indomitus, the era Redemption Corps is set in: the infobox's Dead World and the 'now devastated landscape' and freezing cold of Lexicanum Gomorrah. An authored m41 class 'hive' for the nine and a half centuries before the impact (a hive world of billions; Lexicanum Gomorrah), per ADDING-A-BOOK Step 5a2 rule 2.
gposlow
inferred: no permitted source names a segmentum, sector, system or neighbour for Gomorrah, and none places it relative to Spetzghast, so the record claims no segmentum and sits on the unsurveyed rim at the generator's rim_xy('gomorrah') = [822.6, 790.9] (ported function, checked against beshic-v and cressida; the script itself was not run). The position carries no information and must not be read as one. Z -8.9 is the zPolicy value (compute-z.mjs gomorrah 822.6 790.9).
erasmedium
m41: the hive world and its destruction in 999.M41 (Lexicanum Gomorrah; M41 timeline, citing the novel chs 3, 6, 7), allegiance 'imperium'. indomitus: the dead world of the novel's present, allegiance 'none' (infobox Affiliation 'Unknown, formerly Imperium'; no one holds it). No shelved book is set there in m41; the m41 entry exists so the world reads as what it was in Mortensen's flashbacks.
systemIdlow
'gomorrah': Lexicanum's System field reads 'Unknown', so the id is the world's own. No systems/gomorrah.json is authored (a flashback setting whose system canon does not enumerate; ADDING-A-BOOK Step 5b).