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) H1-4 "Bloodstone" series of adventures, by Douglas Niles and Michael Dobson. His involvement was only hinted at in H1 "Bloodstone Pass" (1985) through the activities of his high priest. In H2 "The Mines of Bloodstone" (1986), minions of Orcus are involved in a number of activities and plots, and the authors hint on page 7 that "Orcus has special reasons for being interested in Bloodstone Pass", promising that more will be revealed in module H3. On page 21, it is revealed that evil duergar have built a temple to Orcus underground, involving a series of planar gates through which he