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
Agri world, recruiting ground of the Jumael Volunteers
A verdant agri world of small farming holdings whose rural communities fill the ranks of the Jumael Volunteers. In Fifteen Hours the farmer's son Arvin Larn is caught in the Imperial draft here and trained for the Jumael 14th before being shipped off to war.
Era Indomituspost-Rift
[RECORD LOST]
No record for this location in Era Indomitus.
Position
Map frame: 205.2, 822.6 in the archive's 0–1000 disk space (core at 500, 500).
Distance from the core: 437 units ≈ 46.5k light years, south-west of the galactic core.
Height above the disk plane: -8.6 units — invented thin-disk jitter, deterministic per record. No published source gives any location a z coordinate.
System: Jumael 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/Jumael_IV (read directly in a browser on 2026-10-01): 'Jumael IV is an Imperial Guard recruiting ground for the Jumael Volunteers', 'an agri world covered in small holdings', System: Jumael, citing Fifteen Hours (chapter headings '22:57 hours Imperial Standard Time' and '20:14 hours Jumal IV Central Planetary Time') and Imperial Armour II p. 39. https://wh40k.lexicanum.com/wiki/Jumael_Volunteers (read directly in a browser on 2026-10-01): conscripts 'from the mostly rural farming communities of the verdant agri world of Jumael IV' (Codex: Imperial Guard, 3rd ed., p. 20). https://wh40k.lexicanum.com/wiki/Fifteen_Hours_(Novel) (read directly in a browser on 2026-10-01): 'The scene shifts to Jumael, where a farmers son named Arvin Larn is caught in the imperial draft.' NAME-COLLISION CHECK: no other index record uses the name.
classhigh
'agri' from what the sources say it LOOKS like: 'verdant agri world', 'covered in small holdings', 'mostly rural farming communities' (Lexicanum Jumael_IV, Jumael_Volunteers). Here the infobox tag (Agri World) and the description agree. 'temperate' was weighed and refused: the farmland is the description, not a generic climate.
segmentumhigh
null: Lexicanum Jumael_IV leaves Segmentum, Sector and Subsector blank and files the page under 'Segmentum Unknown' (read directly in a browser on 2026-10-01). No other permitted source places it.
gposlow
inferred: no published segmentum, sector, subsector or bearing. No segmentum is claimed; unsurveyed rim, no positional information. [205.2, 822.6] is build_locations.py rim_xy('jumael-iv') (the function's arithmetic reproduced, the script not run); Z from compute-z.mjs under zPolicy.
erasmedium
Only 'm41' is carried: Fifteen Hours (June 2005) is undated and the shelf files it M41 — Pre-Great Rift; the Jumael regiments are a 3rd-edition Codex: Imperial Guard creation (Lexicanum Jumael_Volunteers). Imperial Armour II records an undated Ork attack with Gunwagons (Lexicanum Jumael_IV), not used for any era.
systemIdmedium
'jumael' from Lexicanum Jumael_IV's infobox (System: Jumael). No systems/jumael.json: canon enumerates nothing else about the system, and Jumael IV is a VISITED setting of Fifteen Hours, not its primary (no-system-survey).