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
necron
Necron tomb world
An Imperial mining world that turned out to be the lid on a tomb. The Ultramarines failed to retake it once and came back with a Chapter Master and a grudge.
Era Indomituspost-Rift
necron
Necron tomb world
Awake, and no longer pretending to be anything else.
Position
Map frame: 672, 428 in the archive's 0–1000 disk space (core at 500, 500).
Distance from the core: 186 units ≈ 19.8k light years, north-east of the galactic core.
Height above the disk plane: 7.1 units — invented thin-disk jitter, deterministic per record. No published source gives any location a z coordinate.
System: Damnos System
Books set here
2 titles in the reading tracker touch this record, 2 of them as a primary location. Titles link out to the tracker.
derived: Ultima Segmentum, Vidar Sector; placed north-west of the Ultramar cluster and inside the Astronomican's reach, since Damnos was a surveyed, tithed Imperial mining world before the tombs opened. No published bearing exists