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
Sabbat Worlds attrition, fought above the hive of Vesperus
Lysander is the planet beneath Vesperus, the dead hive nicknamed Interceptor City. Bree Jagdea’s Circus 66 fights among its towers during the Sabbat Worlds Crusade.
Era Indomituspost-Rift
[RECORD LOST]
No record for this location in Era Indomitus.
Position
Map frame: 104, 636 in the archive's 0–1000 disk space (core at 500, 500).
Distance from the core: 419 units ≈ 44.5k light years, south-west of the galactic core.
Height above the disk plane: -3.9 units — invented thin-disk jitter, deterministic per record. No published source gives any location a z coordinate.
System: Vesperus System
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.
inferred region: the official reveal places the story in the Sabbat Worlds Crusade; the established Sabbat Worlds cluster is on the Pacificus edge. No precise Lysander system or direct planetary infobox position was inspected.
gposlow
inferred: existing cluster-level [104,636] placement retained. It depicts the Sabbat Worlds cluster, not a published Lysander position. Z follows compute-z.mjs.
editorial: stable legacy systemId vesperus is a render identity, not a canonical system name; no star/body enumeration is sourced, so no authored survey is added.