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
Mining world; Dark Angels protectorate
A cold mining world the Dark Angels recruit from and therefore garrison. An ork force that should have been a footnote got a warp-capable foothold here and had to be dug out of the Kadillus highlands city by city.
Era Indomituspost-Rift
imperium
[RECORD LOST]
[RECORD LOST]
Nothing survives in the archive for Era Indomitus.
Contested record
Segmentum: Lexicanum's Piscina IV infobox says Segmentum Obscurus (Abiaus Sector); Lexicanum's own Planets List says Segmentum Solar. The record files it in Obscurus — the more specific source, and the reading GW's official Era Indomitus map agrees with by drawing Piscina in the north-west near Belis Corona.
Position
Map frame: 240, 380 in the archive's 0–1000 disk space (core at 500, 500).
Distance from the core: 286 units ≈ 30.5k light years, north-west of the galactic core.
Height above the disk plane: -1.8 units — invented thin-disk jitter, deterministic per record. No published source gives any location a z coordinate.
System: Piscina System
Books set here
2 titles in the reading tracker touch this record, 1 of them as a primary location. Titles link out to the tracker.
wh40k.lexicanum.com/wiki/Piscina_IV infobox Class = Mining World; rendered forge for an industrial extraction world, the nearest class this schema has
gposmedium
wh40k.lexicanum.com/wiki/Belis_Corona derived: north-west quadrant, on the Obscurus side of the Solar/Obscurus border and clear of it. Anchored on Belis Corona, which gives as Segmentum Obscurus / Belis Corona Sector and describes as 'a Dead World located near the Eye of Terror, serving as the Segmentum Obscurus Naval Base' — so the Belis Corona vicinity is the Eye's Imperial shoulder, which is where Cadia already sits in this frame
map-canonmedium
official Era Indomitus map: north-west, Belis Corona vicinity (relational). Chair ruling, sprint 3 — the map settles the Obscurus/Solar conflict in favour of Obscurus. Only the relationship was read off the map; the coordinate here is our own derivation in this frame's units