1 day / second
0.5 AU
90482 Orcus
Dwarf Planet
A large trans-Neptunian dwarf planet that orbits in a 2:3 resonance with Neptune, has a small moonlet named Vanth, and displays evidence of water ice and possibly ammonia ice on its surface.
Key Facts
orbital regime | Kuiper Belt |
learn more | Wikipedia |
mass | 6.3480e+20 kg |
radius | 455 km |
hill radius | 0.014 AU |
semi-major axis | 39.174 AU |
eccentricity | 0.227 |
inclination | 20.592º |
longitude of the ascending node | 268.799º |
argument of periapsis | 72.31º |
orbital period | 245.186 years |
surface gravity | 0.021 g |
class | plutino |
discovery date | February 17, 2004 |
discovered by | Michael E. Brown, Chad Trujillo, and David Rabinowitz |
name origins | Named after Orcus, a god of the underworld in Roman mythology |
albedo | 0.1975 |
material composition | Primarily water ice and rock |
density | 1.53 g/cm³ |
Other Dwarf Planets
Ceres
Quaoar
Sedna
Haumea
Eris
Makemake
