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
Contested agri world on the T'au frontier
A backwater farming world almost surrounded by T'au space and judged not worth the supply lines to defend — which is why the argument over it was conducted by diplomats, and why somebody tried to turn that argument into a war.
Era Indomituspost-Rift
contested
[RECORD LOST]
[RECORD LOST]
Nothing survives in the archive for Era Indomitus.
Position
Map frame: 818, 706 in the archive's 0–1000 disk space (core at 500, 500).
Distance from the core: 379 units ≈ 40.3k light years, south-east of the galactic core.
Height above the disk plane: 10.4 units — invented thin-disk jitter, deterministic per record. No published source gives any location a z coordinate.
System: Gravalax 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.
wh40k.lexicanum.com/wiki/Gravalax_System derived: — 'located in Ultima Segmentum close to the Damocles Gulf... Almost surrounded by T'au-controlled space'. Placed on the far south-eastern fringe beyond the Astronomican, which is where that description puts it