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
Tomb of Orcus "during the magistracy of Velu Hulchnie", found elsewhere in the tomb). According to this interpretation, the phrase would translate: Le[ive] erected this monument for posterity [during the magistracy] of Larth Hulchnie and Marce Caliathe. "Marce" is probably a cognate or preform of "Marcus". "Hulchnie" is generally interpreted as the Roman gens "Fulcinius", and "Larth" is believed to be akin to the Greek name "Laertēs"; some have suggested that "Larth Hulchnie" means "Hulchnie, son of Larth". Tomb of Orcus The Tomb of Orcus (), sometimes called the Tomb of Murina (), is a 4th-century BC Etruscan hypogeum (burial chamber) in Tarquinia,