Charon

Charon is Pluto's largest moon, one of the inhabited fortress-rocks that ringed the Khthonic Gate. Alpha Legion teams hit it with the rest of Pluto's satellites in the opening Solar War; later Newborn Sons of Horus boarded the gun-moons and turned their batteries on Sigismund's fleet. Lexicanum's standalone Charon page is a Dark Angels Lexicanium, not this moon.