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
chaos
Flagship of Magnus and the XV Legion
Lead ship of the 28th Expedition and the Legion's archive — everything the fleet learned went into it. Magnus kept a pyramid on the hull with transparent walls and a spiral of Prosperine crystal on the floor, and where a captain stood on that spiral was where he stood in the Legion.
Position: Prospero System (Prospero, Sortiarius) In orbit when Magnus learned the Space Wolves were coming; ordered to lead a quarter of the fleet away from the system under sealed orders, leaving Prospero undefended on purpose Cited in A Thousand Sons
Position: Sol System (Luna, Mars, Terra, Titan) Part of the traitor armada at the Siege of Terra, where it nevertheless helped the loyalist Sisypheum through the raid on Luna for the Magna Mater Cited in The Sons of Selenar
Age of the ImperiumM32–M40
chaos
[RECORD LOST]
[RECORD LOST]
no published station after the Heresy.
Position in this era: [RECORD LOST].
The 41st Millenniumpre-Rift
chaos
[RECORD LOST]
[RECORD LOST]
same gap.
Position in this era: [RECORD LOST].
Era Indomituspost-Rift
chaos
[RECORD LOST]
[RECORD LOST]
same gap.
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 (HH); each era section above carries that era's entry.
Books set here
2 titles in the reading tracker touch this record. 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/Photep 'a Gloriana Class Battleship that served as the flagship of Magnus the Red'; 'heavily modified for a Gloriana class vessel ... outfitted with a significant number of psychically augmented defences'
positionshigh
wh40k.lexicanum.com/wiki/Photep §History, cited to tracked books: A Thousand Sons ch14/16/18/26 for Ullanor, Nikaea and the Prospero withdrawal, The Crimson King ch4 for the Planet of the Sorcerers, Sons of the Selenar ch11 for the Luna raid
position-sortiariusmedium
wh40k.lexicanum.com/wiki/Photep records the ship arriving over the Planet of the Sorcerers, and this dataset carries Sortiarius — but Sortiarius is filed under the prospero system, which already carries this ship's era-hh position from the withdrawal. A second hh entry on the same system would draw the same dock twice, so it is not added; the Crimson King citation is kept here instead
archetypehigh
the catalogue has no Thousand Sons entry, so there is no reference tag to follow. 'gloriana' is both the class canon states and the nearest built family