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 (especially her eye) bears the influence of Hellenistic art. Unlike the Mona Lisa, however, she is noted for her grimace or sneer. The Tomb of Orcus II (sometimes distinguished as "the" Tomb of Orcus) was constructed around 325 BC. Its entrance is guarded by paintings of "Charun" (Charon), the keeper of the underworld, and a cyclops (possibly Polyphemus or Geryon). When the tomb was originally discovered, the cyclops was mistaken for the Roman god of the underworld, Orcus (hence the tomb's name). The back wall depicts a funeral procession overseen by "Aita" (Hades), the Etruscan god of the underworld, and