Orc in common to them. A monster called "Orcus" is mentioned in Edmund Spenser's "Faerie Queene" (Book II, Canto XII, line xlvii). The word ultimately comes from Latin "Orcus", the demonic Roman god of death, who should not be confused with Pluto, the god of the underworld, and has transformed by several stages from the meanings "underworld", "hell", "devil", "evil creature" to "ogre". Tolkien and the lexicons he used attributed the origin of the doubtful Old English "orc" to "Orcus" and in one of his invented languages, the word for orc also had the form "orco". Words derived from or related
90482 Orcus of death, and frequently acted as a guide of the deceased to the underworld. The absolute magnitude of Orcus is approximately 2.3 (comparable with the 2.6 of cubewano 50000 Quaoar). The detection of Orcus by the Spitzer Space Telescope in the far infrared and by Herschel Space Telescope in submillimeter constrains its diameter to . Orcus appears to have an albedo of about 21% to 25%, which may be typical of trans-Neptunian objects approaching the 1000 km diameter range. In the magnitude and size estimates reported above it was assumed that Orcus is a singular object. The presence of a