90482 Orcus Etruscan equivalent of the Roman Pluto, and later became an alternate name for Pluto. The surface of Orcus is relatively bright with albedo reaching 23%, grey in color and water-rich. The ice is predominantly in crystalline form, which may be related to past cryovolcanic activity. Other compounds like methane or ammonia may also be present. The existence of a satellite allowed astronomers to determine the mass of the system, which is approximately equal to that of the Saturnian moon Tethys. The ratio of masses of Orcus and Vanth is uncertain, possibly anywhere from 1:33 to 1:12. The diameter of Orcus
Orcus (Dungeons & Dragons) to resurrect Orcus was seemingly disrupted, "Orcus returned all the same". The "Book of Vile Darkness" reveals that Orcus has reinstated himself to his former position, once again finding himself in a struggle for dominance with other demon lords. The third edition "Tome of Magic" reveals that part of the godly power that Orcus shed after his death and subsequent resurrection as a demon lord remained intact. Less than a god but still divine, this essence coalsced into the bitter sentience which became the vestige Tenebrous, the Shadow that Was - "a pale reflection of what he once was, a