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) slumber, Acererak scheming with the Negative Energy Plane, and a once-powerful follower of Orcus sending a final impassioned prayer. Orcus was now "a thin, small, shadowy creature", and renamed himself Tenebrous. He was still a god, but much less powerful than before his death. His servants had been slain by Kiaransalee, so Tenebrous brought them back as undead tanar'ri called "visages", tasking them to gather information to plot his vengeance. He also found the Last Word in the ruins of Pelion on the plane of Arborea, which he could use to slay even gods. He sought the "Wand of Orcus",