This archive tracks four layers. A record present in 2 of them (M41, IND) is silent in the rest, and says so.
The Horus HeresyM30–M31
[RECORD LOST]
No record for this location in The Horus Heresy.
Position in this era: [RECORD LOST].
Age of the ImperiumM32–M40
[RECORD LOST]
No record for this location in Age of the Imperium.
Position in this era: [RECORD LOST].
The 41st Millenniumpre-Rift
necron
Necron planetoid, under way
A planet-sized Necron vessel that crossed Imperial space destroying what it passed, and was stopped by a Chapter that rammed a battle-barge into it and died to a man doing it.
Position: Sanctuary 101 System (Sanctuary 101) Cutting through the Vidar Sector on the Eastern Fringe, which is the theatre the sources place its rampage in Cited in The World Engine
Era Indomituspost-Rift
none
Destroyed
Nothing of it survives except the monument the Imperium built out of the wreck and the Chapter's name.
Position in this era: [RECORD LOST].
Position
A mobile record: it carries a position timeline rather than a fixed point. The archive places it in 1 of the four eras (M41); each era section above carries that era's entry.
Books set here
1 title in the reading tracker touches this record, 1 of them as a primary location. Titles link out to the tracker.
Every fact in this record, and where it came from. Editorial derivations say so.
classhigh
wh40k.lexicanum.com/wiki/World_Engine 'a planetoid-sized Necron space vessel that carved a swathe of destruction through the Imperium before it was destroyed in M41'
positionslow
inferred: the sprint-3 candidate report surfaced the Vidar Sector for this book, and this dataset now places a world in that sector. The dock is against that world's system and is a theatre-level statement, not a coordinate