This archive tracks four layers. A record present in 1 of them (M41) 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
Deathwatch watch fortress
A Deathwatch watch fortress: a vast artificial ring around a glowing moon, older than the Imperium and built by no human hand, one of six such rings the Ordo Xenos has found and converted. It is the centre of Deathwatch operations in the Centaurus Arm, where new inductees are brought and Talon Squad is trained into a kill-team (Deathwatch).
Era Indomituspost-Rift
[RECORD LOST]
No record for this location in Era Indomitus.
Position
Map frame: 850, 385 in the archive's 0–1000 disk space (core at 500, 500).
Distance from the core: 368 units ≈ 39.2k light years, east of the galactic core.
Height above the disk plane: -8.3 units — invented thin-disk jitter, deterministic per record. No published source gives any location a z coordinate.
System: Damaroth 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.
Every fact in this record, and where it came from. Editorial derivations say so.
identityhigh
wh40k.lexicanum.com/wiki/Damaroth (read directly in a browser on 2026-10-03): 'a Deathwatch Watch Fortress. A vast artificial ring around a glowing moon, it is the centre of Deathwatch operations in the Centaurus Arm of the Ultima Segmentum'; it predates the Imperium, is 'one of six such structures found so far, each one converted by the Inquisition of the Ordo Xenos', and no trace of its makers has been found (Deathwatch (Novel) Act 1 ch. 12, pgs. 50-51). Also https://wh40k.lexicanum.com/wiki/Watch_Fortress (ch. 12, pg. 50), https://wh40k.lexicanum.com/wiki/Marnus_Lochaine (its Chief Librarian, Act 2 ch. 2) and https://wh40k.lexicanum.com/wiki/Maximmion_Voss ('the new inductees at Watch Fortress Damaroth', Act 2 ch. 10). NAME-COLLISION CHECK: no index record uses the id, label or alias.
book-joinhigh
PRIMARY for Deathwatch: Black Library's description has Talon Squad 'trained in an ironclad Watch Fortress' before its first mission, and the novel's whole second act, 'The Watch', is cited to it (Lexicanum Marnus_Lochaine Act 2 ch. 2; Maximmion_Voss Act 2 chs 10 and 12); the Adonai brings the inductees there (Adonai, Act 1 ch. 12).
typehigh
station: an artificial ring around a moon, converted into a watch fortress (Lexicanum Damaroth). The moon it circles is unnamed and has no record.
segmentumhigh
ultima: Lexicanum Damaroth, 'the Centaurus Arm of the Ultima Segmentum'.
gposlow
inferred: segmentum-level. Ultima is published and so is 'the Centaurus Arm', but this dataset carries no Centaurus Arm feature to place against and no source gives a bearing, so the marker sits in open Ultima space at (850, 385), inside the stylised 'ultima' polygon (about 90 units from its edge, checked) and 80 units from the nearest existing marker (Lastrati, Croatoas). The position means only 'somewhere in Ultima'. Z -8.3 is the zPolicy value (compute-z.mjs damaroth 850 385).
erasmedium
m41 only, the era the shelf files Deathwatch in. Allegiance imperium (Deathwatch, Ordo Xenos).
systemIdlow
'damaroth', named for the fortress: canon gives a glowing moon and no star, planet or system name. no-system-survey: a one-moon file would invent the primary the moon must orbit, so none is authored.