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
contested
Imperial world infested by Tyranid hordes
The world where Colonel 'Iron Hand' Straken leads the Catachan II against the Tyranid hordes infesting it, in the war Black Library calls catastrophic, and takes a Hive Tyrant's head with his Catachan Fang before the regiment is pulled out and sent to Dulma'lin: the prologue of Straken. Nothing else is published about the world.
Era Indomituspost-Rift
[RECORD LOST]
No record for this location in Era Indomitus.
Position
Map frame: 936.3, 547.5 in the archive's 0–1000 disk space (core at 500, 500).
Distance from the core: 439 units ≈ 46.7k light years, east of the galactic core.
Height above the disk plane: -11.4 units — invented thin-disk jitter, deterministic per record. No published source gives any location a z coordinate.
System: Signis 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/Straken (read directly in a browser on 2026-10-02), citing Straken (Novel), Prologue: 'On Signis VIII, Straken lead the assault against the Tyranid hordes infesting the planet', ending with the Hive Tyrant beheaded. Black Library's description on https://wh40k.lexicanum.com/wiki/Straken_(Novel): 'Plucked from a catastrophic war against the monstrous tyranids'. Signis_VIII is a REDLINK; Lexicanum full-text search for 'Signis' returns only Straken and The_Apex_(Short_Story) (Tyranids on Signis VII, a different body of the same name-system; not shelved). NAME-COLLISION CHECK: no other index record uses the name.
classlow
editorial, NOT a citation: no permitted source gives Signis VIII a world type, terrain, climate or colour; the only facts are an Imperial Guard assault and a Tyranid infestation. Rendered `temperate` as the neutral default for an inhabited world, as for fura-iv, helwain and nikaea. 'death' refused (it paints jungle and nothing says jungle), 'dead' refused (nothing says the world was consumed).
segmentumhigh
null, and stated rather than guessed: no permitted source gives Signis VIII a segmentum, sector, bearing or neighbour (Lexicanum Straken; Straken_(Novel); full-text search 'Signis'). That the regiment is redeployed from it to Dulma'lin in Ultima is not a statement of where it is.
gposlow
inferred: named in the book and unplaced anywhere else. Unsurveyed rim at the generator's rim_xy('signis-viii') = [936.3, 547.5], r = 438.9 of the 470-unit disk (build_locations.py's fnv1a/rim_xy arithmetic reproduced and checked against belmos-vii [166.0, 803.2] and voor [183.2, 197.8]; the script itself was not run). The position carries no information and must not be read as one; segmentum null is the statement. Nearest marker Carinae, another rim record, at 5.0 units. Z -11.4 is the zPolicy value (compute-z.mjs signis-viii 936.3 547.5).
erasmedium
m41 only: Straken's prologue precedes the 926.M41 Dulma'lin Cleansing (Lexicanum Straken), and the shelf files the book M41 — Pre-Great Rift. Allegiance 'contested': an Imperial world under Tyranid attack; its fate is not published.
systemIdmedium
'signis' from the world's designation (an eighth body of a Signis system; The Apex places Tyranids on Signis VII). No survey is authored: Signis VIII is a VISITED join, not a primary setting, and canon names no star.