This archive tracks four layers. A record present in 3 of them (HH, M41, IND) is silent in the rest, and says so.
The Horus HeresyM30–M31
chaos
Realm of Chaos; the Blood Angels' trial
Seven hive worlds and fifteen moons handed over to a Greater Daemon of Slaanesh, who built a palace on Signus Prime out of the wreckage. Horus sent the Blood Angels here expecting them to die; they won, and were never the same afterwards.
Age of the ImperiumM32–M40
[RECORD LOST]
No record for this location in Age of the Imperium.
The 41st Millenniumpre-Rift
none
Quarantined world
Interdicted and left alone.
Era Indomituspost-Rift
noneImperium Sanctus
Quarantined world
Still under quarantine.
Position
Map frame: 610, 520 in the archive's 0–1000 disk space (core at 500, 500).
Distance from the core: 112 units ≈ 11.9k light years, east of the galactic core.
Height above the disk plane: 5.3 units — invented thin-disk jitter, deterministic per record. No published source gives any location a z coordinate.
System: Signus 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.
derived: Ultima Segmentum, placed on the western Ultima marches within a single fleet redeployment of the Warmaster's staging areas — the trap only works if the diversion is plausible. No published bearing exists