90482 Orcus This means that Orcus is currently viewed pole-on, which could explain the near absence of any rotational modulation of its brightness. If, however, the primary is tidally locked with the satellite, the rotational period will coincide with the 9.7-day orbital period of Vanth. This minor planet was named after one of the Roman gods of the underworld, Orcus. While Pluto was the ruler of the underworld, Orcus was a punisher of the damned. The approved naming citation was published by the Minor Planet Center on 26 November 2004 (). Under the guidelines of the International Astronomical Union's (IAU) naming conventions,
Sinmara Orcus, a god of the underworld in Roman mythology, and that Hel is blue or half blue and half light, like the Roman goddess Proserpina, whom Saxo equates to Hel in his "Gesta Danorum". Falk further notes that Sinmara is referred to as "aurglasis Eirr", which he translates as "the goddess of the gold ring", and compares Hel's being called "Gjallar sunnu gátt" "wearer of the necklace" in stanza 9 of the poem "Forspjallsljóð". Björn Olsen associates the kenning with "veðurglasir", a name of Yggdrasill in stanza 24 of the same poem, and translates "aurglasir" as a name for the