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
Abandoned paradise world near the Eye of Terror
An Imperial world on the fringes of the worlds around the Eye of Terror, once a Paradise World where high-ranking servants of the Imperium retired after centuries of service, abandoned when its environment turned on the inhabitants and the forests and predators claimed it back. It appears late in Hammer of Daemons.
Era Indomituspost-Rift
[RECORD LOST]
No record for this location in Era Indomitus.
Position
Map frame: 160, 335 in the archive's 0–1000 disk space (core at 500, 500).
Distance from the core: 378 units ≈ 40.2k light years, north-west of the galactic core.
Height above the disk plane: -7.4 units — invented thin-disk jitter, deterministic per record. No published source gives any location a z coordinate.
System: Belsimar System
Books set here
1 title in the reading tracker touches this record. 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/Belsimar (read directly in a browser on 2026-10-03): 'a Imperial world that used to be a Paradise World where high ranking officers of the Imperium would retire after centuries of service. The world is located of the fringes of the world surrounding the Eye of Terror and the planet was abandoned ... after the environment turned on the inhabitants and the forests and predators claimed the planet' (Hammer of Daemons, ch. 26); infobox Affiliation Imperium, Class 'former Paradise World'. https://wh40k.lexicanum.com/wiki/Nyxos: 'the ex-Pleasure world Belsimar' (ch. 26). NAME-COLLISION CHECK: no index record uses the id or label.
book-joinmedium
VISITED for Hammer of Daemons (grey-knights::gk-main::2.6): chapter 26, where Nyxos receives Alaric's communication from Belsimar and recovers him (Lexicanum Nyxos, Belsimar).
segmentumlow
derived, not published: Lexicanum's Belsimar infobox leaves Segmentum blank (category 'Segmentum Unknown'), but the page places the world 'on the fringes of the worlds surrounding the Eye of Terror', and the Eye of Terror lies in Segmentum Obscurus (Lexicanum Eye_of_Terror; Drakaasi; Daemon_World). Obscurus is that positional statement carried to the segmentum it implies.
classmedium
'death', chosen by what it LOOKS like, NOT the infobox tag: 'former Paradise World' is a history, and the paradise is gone. What the world looks like now is that 'the forests and predators claimed the planet' after 'the environment turned on the inhabitants' (Lexicanum Belsimar), an overgrown, hostile forest world, which is exactly this dataset's green-jungle death palette. 'temperate' would paint the resort it no longer is.
gposlow
inferred: region-level. Canon places the world only 'on the fringes of the worlds surrounding the Eye of Terror' (Lexicanum Belsimar). Placed just outside our Eye of Terror feature (regions.json centre 180,300, radius 29) at (160, 335), 40 units from the Eye's centre and 29 from the nearest marker (Hesperax); no bearing is published, so the side of the Eye is arbitrary and the coordinate claims nothing finer than 'at the Eye's edge'. Z -7.4 is the zPolicy value (compute-z.mjs belsimar 160 335).
no-system-surveymedium
No systems/belsimar.json: canon names no star, sibling or body count.
erasmedium
m41 only, the novel's era (999.M41). Allegiance 'imperium' (Lexicanum infobox), though abandoned.