Orcus

Orcus is a trans-Neptunian dwarf planet with a large moon, Vanth. It has a diameter of 910 km. The surface of Orcus is relatively bright with albedo reaching 23 percent, neutral in color and rich in water ice. The ice is predominantly in crystalline form, which may be related to past cryovolcanic activity. It has an orbital period of 247 years. Orcus has a mass of 6.32 × 10^20 kg and a regular gravity level of 0.18 m/s². Orcus has a temperature of < 44 K. It is located in the Kuiper belt. It was discovered in 17 February 2004. In accordance with the IAU's astronomical conventions, objects with a similar size and orbit to that of Pluto are to be named after underworld deities. Therefore, the discovery team suggested the name Orcus, after the Etruscan god of the underworld and the equivalent of the Roman god Pluto. Orcus is a plutino, a trans-Neptunian object that is locked in a 2:3 resonance with the ice giant Neptune, making two revolutions around the Sun to every three of Neptune's. This is much like Pluto, except that the phase of Orcus's orbit is opposite to Pluto's: Orcus is at aphelion (most recently in 2019) around when Pluto is at perihelion (most recently in 1989) and Vice Versa.

Fun facts

•It has an orbital period of 9.54 days

•Orcus is named after the ancient Roman god of the underworld

•Orcus is 92,957,000 miles from the Sun

•In 10 years Orcus will have a thick atmosphere

•It is categorized as a Plutino object

•Orcus has a ecliptic orbit

•It's actual name is 90482 Orcus