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) Baphomet, allowing Yeenoghu to invade and plunder the plane of Baphomet; Orcus then forced Baphomet into imprisonment, to guard an open platform from intruders until he fulfils all of the conditions that Orcus has decreed. The first edition "Monster Manual II" described the realms of Orcus: "Orcus' manifold layers are populated with skeletal monsters, various sorts of zombies, huecuvae, shadows, sheet phantoms, vampires, and death knights." The first edition "Manual of the Planes" describes the layer of the Abyss ruled by Orcus: "The dwelling of Orcus is a great palace made of bones, rising out of ground bone meal. His