This archive tracks four layers. A record present in 3 of them (HH, AoI, M41) is silent in the rest, and says so.
The Horus HeresyM30–M31
imperium
Imperial deep monitoring station
After the Scouring of the Nostramo Sector, a deep monitoring station on the edge of the Ghoul Stars; in 063.M31 under Crysos Morturg, Captain of the 108th Independent Company and once of the Death Guard.
Age of the ImperiumM32–M40
imperium
Death Spectres homeworld
Homeworld of the Death Spectres from the 'Dark' Thirteenth Founding in late M35 or early M36, when the first Chapter Master, Merrin Corcaedus, came to Occludus following a vision from the Emperor and found the Shariax in a cavern beneath its surface.
The 41st Millenniumpre-Rift
imperium
Death Spectres homeworld
The dark world of the Death Spectres, overlooking the Ghoul Stars, its surface filled with graveyards. The Chapter's fortress-monastery is the crypt-city of the Logopol, and in a secret cavern beneath it lies the Shariax, the Throne of Glass. Codicier Lyandro Karras is called from here to the Deathwatch (Deathwatch).
Era Indomituspost-Rift
[RECORD LOST]
No record for this location in Era Indomitus.
Position
Map frame: 785, 225 in the archive's 0–1000 disk space (core at 500, 500).
Distance from the core: 396 units ≈ 42.1k light years, north-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: Occludus 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/Occludus (read directly in a browser on 2026-10-03): 'the homeworld of the Death Spectres Space Marine Chapter. It is located to the far northeast of Ultima Segmentum, overlooking the Ghoul Stars' (Codex: Space Marines 5th ed., pg. 30); Nostramo Sector and the 063.M31 monitoring station under Crysos Morturg (The Horus Heresy Book Six - Retribution, pg. 144); homeworld since the Thirteenth Founding (Imperial Armour Volume Ten); 'home to the Chapter's Fortress-Monastery, the Logopol and its surface is filled with many graveyards' and the Shariax beneath it (Deathwatch (Novel) Act 1 chs 3 and 5). https://wh40k.lexicanum.com/wiki/Logopol: 'Located on the dark world of Occludus, the Logopol is described as a crypt-city' (ch. 3). NAME-COLLISION CHECK: no index record uses the id or label.
book-joinhigh
VISITED for Deathwatch: Act 1, 'The Call', opens Karras's part on his Chapter's world (Lexicanum Occludus and Logopol, ch. 3; Shariax and Merrin_Corcaedus, chs 5-6; Athio_Cordatus, chs 4-5; Death_Spectres, ch. 5) before the Adonai carries him to Damaroth (Adonai, ch. 12).
segmentumhigh
ultima: Lexicanum Occludus, 'far northeast of Ultima Segmentum'.
classlow
'dead', a palette choice and not the infobox (Class: Adeptus Astartes Homeworld) or the Logopol fortress-monastery: the only look words are 'the dark world of Occludus', a 'crypt-city' and a surface 'filled with many graveyards' (Lexicanum Logopol, Occludus), on the edge of the Ghoul Stars, whose worlds are 'lit by the cold rays of dying suns' (Ghoul_Stars). The dark grey ramp is the nearest picture of that; it is a LOOK, not a status: Occludus is inhabited, and the era statuses say so. Tried and refused: 'fortress', whose ramp rendered pale blue-white on this record's seed, reading as an ice world in the library card (looked at 2026-10-03); 'shrine', whose bone plains rise to gilded peaks that nothing describes.
gposlow
inferred: region-level. Canon publishes 'far northeast of Ultima Segmentum, overlooking the Ghoul Stars'; placed at (785, 225) in the north-east corner of the stylised 'ultima' polygon (63 units inside its edge, checked), beneath the regions.json Ghoul Stars label at (812, 170) and 396 units from the core, inside the disk and clear of the unsurveyed-rim band. Retribution's 'Nostramo Sector' is not used: this index's Nostramo record sits at (840, 660) on a different reading of 'the edge of the Ghoul Stars', and moving either is outside this book. Z -8.9 is the zPolicy value (compute-z.mjs occludus 785 225).
erasmedium
hh from Lexicanum's Retribution line (063.M31, the monitoring station); aoi from the Thirteenth Founding, late M35/early M36 (Lexicanum Occludus, citing Imperial Armour Volume Ten, and Merrin_Corcaedus, Deathwatch Act 1 ch. 5); m41 for Deathwatch. Allegiance imperium in all three.
systemIdlow
'occludus', named for the world: no source names its star or a sibling body. No survey file; the synthesised system is the render.