This archive tracks four layers. A record present in 4 of them (HH, AoI, M41, IND) is silent in the rest, and says so.
The Horus HeresyM30–M31
imperium
Homeworld of Rogal Dorn and the VII Legion
An ice world whose people survived by hoarding, rationing and building, run by a merchant house that Dorn led before the Emperor found him. The Imperial Fists' habits all start here.
Age of the ImperiumM32–M40
imperium
Imperial Fists recruiting world
A Chapter with no fixed homeworld still takes its aspirants from the Inwit Cluster.
The 41st Millenniumpre-Rift
imperium
Imperial Fists recruiting world
Cold, poor and reliable — the Chapter's recruiting ground rather than its home, since its home is the Phalanx.
Era Indomituspost-Rift
imperium
Imperial Fists recruiting world
Unchanged. It has been asked for more recruits than at any time since the Heresy.
Position
Map frame: 400, 645 in the archive's 0–1000 disk space (core at 500, 500).
Distance from the core: 176 units ≈ 18.7k light years, south-west of the galactic core.
Height above the disk plane: 4.6 units — invented thin-disk jitter, deterministic per record. No published source gives any location a z coordinate.
System: Inwit System
Books set here
3 titles in the reading tracker touch this record. Titles link out to the tracker.
derived: Segmentum Tempestus, placed on the segmentum's coreward edge toward the Solar border. No published bearing exists
book-linkhigh
wh40k.lexicanum.com/wiki/Inwit named in three tracked books, each cited on for a different fact: Praetorian of Dorn (horus-heresy::hh-main::39, 'Gifts of the Father'), The First Wall (horus-heresy::siege-of-terra::3, ch5) and Watchers of the Throne: The Regent's Shadow (watchers-of-the-throne::wot-main::2, ch4). Dorn's homeworld is spoken about across the corpus and set foot on in none of it, so all three links are role 'mentioned'