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
Home of Monarchia; burned by the Emperor
The Word Bearers spent decades building Monarchia here as a city in the Emperor's honour. He had it levelled in front of Lorgar to prove a point about worship, and the Legion turned to the only other thing that would accept it.
Age of the ImperiumM32–M40
none
Dead world
Left as it was left. The lesson was the point; the world was not.
The 41st Millenniumpre-Rift
none
Dead world
Subjected to Exterminatus during the Great Scouring, after the Word Bearers had made it theirs again.
Era Indomituspost-Rift
[RECORD LOST]
No record for this location in Era Indomitus.
Position
Map frame: 145, 700 in the archive's 0–1000 disk space (core at 500, 500).
Distance from the core: 407 units ≈ 43.4k light years, south-west of the galactic core.
Height above the disk plane: 3.8 units — invented thin-disk jitter, deterministic per record. No published source gives any location a z coordinate.
System: Khur System
Books set here
1 title in the reading tracker touches this record. Titles link out to the tracker.
wh40k.lexicanum.com/wiki/Khur infobox Class = Dead World; Lexicanum's Planets (List) adds 'Subjected to Exterminatus during the Great Scouring'
gposlow
derived: Segmentum Pacificus, placed near Colchis on the reasoning that the Word Bearers' first conquest and their homeworld sit in the same reach of the segmentum. Relational, not published