90482 Orcus This means that Orcus is currently viewed pole-on, which could explain the near absence of any rotational modulation of its brightness. If, however, the primary is tidally locked with the satellite, the rotational period will coincide with the 9.7-day orbital period of Vanth. This minor planet was named after one of the Roman gods of the underworld, Orcus. While Pluto was the ruler of the underworld, Orcus was a punisher of the damned. The approved naming citation was published by the Minor Planet Center on 26 November 2004 (). Under the guidelines of the International Astronomical Union's (IAU) naming conventions,
Charon's obol "On the Nature of the Gods", Cicero identifies the Roman god Dis Pater with the Greek Pluton, explaining that riches are hidden in and arise from the earth. Dis Pater is sometimes regarded as a chthonic Saturn, ruler of the , whose consort Ops was a goddess of abundance. The obscure goddess Angerona, whose iconography depicted silence and secrecy, and whose festival followed that of Ops, seems to have regulated communications between the realm of the living and the underworld; she may have been a guardian of both arcane knowledge and stored, secret wealth. When a Roman died, the treasury