|Map||Basic Data||Planetary Image|
|Affiliation:||Imperium (Adeptus Mechanicus)|
|Class:||War World, Research Station|
It once suffered a Daemonic incursion that was defeated by the Grey Knights Chapter, who later left the Dreadnoughts Jahon and Steel Vigilance to stand sentinel over Phaedon Alpha to search for signs of another incursion.
However, when the Daemons known as The Adulant Host of Hazriah the Believer materialized from the Warp, the Grey Knights strike force sent to stop them was defeated in their initial battle. Despite taking heavy losses, including its leader the Librarian Jakon, the strike force remains unbroken and are still fighting to defeat the Adulant Host, in order to save Phaedon Alpha.