90482 Orcus given the designation S/2005 (90482) 1 before later being named "Vanth". It orbits Orcus in a nearly face-on circular orbit with an eccentricity of about 0.007, and an orbital period of 9.54 days. Vanth orbits only from Orcus and is too close to Orcus for ground-based spectroscopy to determine the surface composition of the satellite. Mike Brown suspects that like the Pluto–Charon system, Orcus and Vanth are tidally locked. Vanth does not resemble known collisional satellites because its spectrum is very different from that of its primary, and it may be a captured KBO. Vanth could also have originated as
Orcus (Dungeons & Dragons) includes some details about his realm and his return. Orcus was used as the driving force for the adventure "Headless", which appears on pages 47–66 of "Dungeon" #89 (November 2001). Although the adventure recommends not having Orcus fight the player characters directly, third edition game statistics are provided for Orcus on page 64 if he is to be used as a recurring villain. He only appears personally at the end of the adventure to reclaim one of his possessions and warn the characters to cease meddling in his affairs. Orcus is featured as one of the demon lords appearing in