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
Ancient Mesopotamian underworld originally meant "canal inspector of An" and he may be merely an alternative name for Ennugi. The son of Ereshkigal and Gugalanna is Ninazu. In "Inanna's Descent into the Underworld", Inanna tells the gatekeeper Neti that she is descending to the underworld to attend the funeral of "Gugalanna, the husband of my elder sister Ereshkigal". During the Akkadian Period ( 2334 – 2154 BC), Ereshkigal's role as the ruler of the underworld was assigned to Nergal, the god of death. The Akkadians attempted to harmonize this dual rulership of the underworld by making Nergal Ereshkigal's husband. Nergal is the deity