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
none
Destroyed; the Sabbat Worlds Crusade
A quiet forest world in the Newfound Trailing Group, lost to Chaos on the night its first and only regiments were raised. The Tanith First are all that is left of it.
Era Indomituspost-Rift
noneImperium Sanctus
Dead world
Nothing came back to it.
Position
Map frame: 105, 545 in the archive's 0–1000 disk space (core at 500, 500).
Distance from the core: 398 units ≈ 42.3k light years, west of the galactic core.
Height above the disk plane: -2.7 units — invented thin-disk jitter, deterministic per record. No published source gives any location a z coordinate.
System: Tanith System
Books set here
2 titles in the reading tracker touch this record, 1 of them as a primary location. Titles link out to the tracker.
wh40k.lexicanum.com/wiki/Tanith infobox Class = Dead World, Frontier World, former Forest World, former Feudal World; Population = 0
gposlow
derived: Segmentum Pacificus, Sabbat Worlds sector — placed in the northern part of the Pacificus wedge, west of Terra, as a frontier group on the crusade's trailing edge