90482 Orcus given the designation S/2005 (90482) 1 before later being named "Vanth". It orbits Orcus in a nearly face-on circular orbit with an eccentricity of about 0.007, and an orbital period of 9.54 days. Vanth orbits only from Orcus and is too close to Orcus for ground-based spectroscopy to determine the surface composition of the satellite. Mike Brown suspects that like the Pluto–Charon system, Orcus and Vanth are tidally locked. Vanth does not resemble known collisional satellites because its spectrum is very different from that of its primary, and it may be a captured KBO. Vanth could also have originated as
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