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) Orcus (Dungeons & Dragons) Orcus is a fictional demon prince and lord of the undead in many campaign settings for the "Dungeons & Dragons" fantasy role-playing game. He is named after Orcus of Roman mythology. His symbol is a mace with a human skull as the head. Orcus is one of the most detailed demon lords of the "Dungeons & Dragons" game and one of a small handful to be detailed in every edition of the game. Orcus was also named as one of the greatest villains in "D&D" history by the final print issue of "Dragon". "Dungeons & Dragons