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
unknown
Ocean World
An ocean world, known only from a passing mention in Conquest of Armageddon (chapter 2). Canon records its class and nothing else: no system, sector or segmentum, and no event.
Era Indomituspost-Rift
[RECORD LOST]
No record for this location in Era Indomitus.
Position
Map frame: 856.1, 758 in the archive's 0–1000 disk space (core at 500, 500).
Distance from the core: 440 units ≈ 46.8k light years, south-east of the galactic core.
Height above the disk plane: 0.2 units — invented thin-disk jitter, deterministic per record. No published source gives any location a z coordinate.
System: Eswulus 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/Eswulus (read directly in a browser on 2026-10-02): 'Eswulus is an Ocean World', infobox Segmentum, Sector, Subsector, System, Population and Affiliation all 'Unknown', sole source Conquest of Armageddon (Novel), Chapter 2, pg. 38; Lexicanum Planets_(List) agrees (Ocean World, same citation). NAME-COLLISION CHECK: no index record uses the name and the page carries no disambiguation note.
segmentumhigh
null: the infobox gives Segmentum 'Unknown' and the page files the world under Segmentum Unknown.
gposlow
inferred: NAMED but never located, so no segmentum is claimed and the record sits on the unsurveyed rim at the generator's rim_xy('eswulus') = [856.1,758] (build_locations.py's rim_xy evaluated on its own, reproducing heliogabalus [930.6, 442.4], chevreuse [931.5, 388.0], kallash [759.0, 848.6] and solemnus [482.4, 950.8]; the script itself was not run). The position carries no information and must not be read as one. Z 0.2 is the zPolicy value (compute-z.mjs eswulus 856.1 758).
classmedium
'ocean': the one published fact is the class Ocean World, and an ocean world is exactly what the dataset's ocean palette paints (Talassar, Laeran, Vytarn), so the tag and the picture agree here, unlike the Death World tag Step 5a2 warns about. Medium because no terrain or colour words are published beyond the class.
eraslow
m41 only, the era of the book that names it; the mention is undated. Allegiance 'unknown': the infobox gives Affiliation 'Unknown'. The status names the class only, which is all canon states.
systemIdlow
editorial: 'eswulus', the world's own name; the infobox gives System 'Unknown' and no star or other body is published. No survey authored (no-system-survey): the world is MENTIONED, not the book's setting, and canon enumerates nothing about its system.