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
Orc in a dark forest or garden and that might capture and eat humans, or be indifferent or even benevolent—all depending on the tale. Note that the Italian term "orco" is derived directly from the Latin Orcus, and is correctly translated into English as "ogre". In early Roman mythology, Orcus was a god of the underworld, and in medieval times, by association with death and the underworld, the term "orcus" also began to see use for other monstrous creatures and incorporated into the medieval bestiary. In particular, the Italian "orco" implies an anthropomorphic creature with bestial aspects, often demonic, suggestive of