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
Vladislav Petković Dis a village near the town of Zaječar. He did not like teaching, and his small output of poetry brought him little income. In 1903, he moved to Belgrade, and became prominent in the literary life there, when his poems appeared in "Idila", a literary magazine.Vladislav Petković chose his appellation "Dis" as a repetition of the middle syllable of his first name, but also as the name of the Roman god of the underworld. He was a frequent evening visitor to the Belgrade's "kafanas" in Skadarlija and elsewhere where he would drink and compose new verse at the same time. He