Dwarf Planet
Orcus
TypeDwarf Planet
Mass~6.4 × 10²⁰ kg
Diameter910 km
Orbital Radius5,896 million km
Orbital Period90,240 days
Rotation Period13.2 hours
Known Moons1
Surface Gravity~0.2 m/s²
Average Temp-229 °C
AtmosphereNone
Discovered ByBrown, Trujillo, Rabinowitz
Discovery Year2004
About Orcus
The anti-Pluto, a plutino locked in the same 2:3 resonance with Neptune but orbiting opposite Pluto in the cycle. Crystalline water ice and ammonia hint at past cryovolcanism. Its big moon Vanth is nearly half its size.
Orcus has 1 known moons in total.
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