This archive tracks four layers. A record present in 4 of them (HH, AoI, M41, IND) is silent in the rest, and says so.
The Horus HeresyM30–M31
imperium
Forge world; overthrown by its own moon
The tech-guilds that ran Kiavahr worked the prison moon above them until the moon revolted and bombarded them. Corax's rising started here as a labour uprising and finished as a Legion.
Age of the ImperiumM32–M40
imperium
Forge world
Rebuilt under the Raven Guard's authority and tithed to the Chapter above it.
The 41st Millenniumpre-Rift
imperium
Forge world
Still forging for Deliverance, still second in its own system.
Era Indomituspost-Rift
imperium
Forge world
Supplying a Chapter that has spent the post-Rift years rebuilding from near-destruction.
Position
Map frame: 470, 660 in the archive's 0–1000 disk space (core at 500, 500).
Distance from the core: 163 units ≈ 17.3k light years, south 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.