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 name "Tomb of Orcus". The Italian name ("Tomba dell'Orco") can also mean "Tomb of the Ogre", and it is used that way in Italy today. The second tomb has never been fully excavated. Though most of the walls are muraled, the artists did not complete the ceiling. A scientific analysis in 2001 revealed that the paint used contained cinnabar, ochre, orpiment, calcite, copper, and Egyptian blue. While the artwork in Orcus I is highly praised (particularly the painting of Velia Velcha; see below), some of the artwork of Orcus II is considered poorly done. It is likely that the French