Orcus
E80084
Orcus is a large trans-Neptunian dwarf-planet candidate in the Kuiper Belt, often considered a "twin" of Pluto due to its similar size, orbit, and composition.
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
Kuiper belt object
ⓘ
dwarf-planet candidate ⓘ plutino ⓘ trans-Neptunian object ⓘ |
| absoluteMagnitude | about 2.3 ⓘ |
| albedo | approximately 0.23 ⓘ |
| aphelionDistance | approximately 48.1 astronomical units ⓘ |
| belongsToDynamicalClass |
plutino
ⓘ
resonant Kuiper belt object ⓘ |
| celestialBodyType | icy trans-Neptunian object ⓘ |
| classificationStatus | dwarf-planet candidate ⓘ |
| density | about 1.5 g/cm³ ⓘ |
| discoveredBy |
Chad Trujillo
ⓘ
David L. Rabinowitz ⓘ
surface form:
David Rabinowitz
Michael E. Brown ⓘ |
| discoveryDate | 2004-02-17 ⓘ |
| discoverySite | Palomar Observatory ⓘ |
| eccentricity | about 0.22 ⓘ |
| gravitationallyBoundTo | Sun ⓘ |
| hasAlternativeName |
2004 DW
ⓘ
90482 Orcus (2004 DW) ⓘ |
| hasMeanSurfaceTemperature | around 40–50 K ⓘ |
| hasNumberDesignation | 90482 Orcus ⓘ |
| hasOrbitalCategory | trans-Neptunian region ⓘ |
| hasSatellite | Vanth ⓘ |
| inclination | about 20.6 degrees ⓘ |
| isCandidateFor | dwarf planet status ⓘ |
| locatedIn |
Kuiper Belt
ⓘ
surface form:
Kuiper belt
|
| mass | about 6.4×10^20 kilograms ⓘ |
| meanDiameter | approximately 910 kilometers ⓘ |
| namedAfter | Orcus (Roman god of the underworld) ⓘ |
| observedBy | Hubble Space Telescope ⓘ |
| oftenDescribedAs | twin of Pluto ⓘ |
| orbitalPeriod | approximately 247 Earth years ⓘ |
| orbitalResonanceRatio | 2:3 ⓘ |
| orbitalResonanceWith | Neptune ⓘ |
| orbits | Sun ⓘ |
| perihelionDistance | approximately 30.3 astronomical units ⓘ |
| rotationPeriod | about 10.5 hours ⓘ |
| semiMajorAxis | approximately 39.2 astronomical units ⓘ |
| similarTo | Pluto ⓘ |
| spectralType | neutral to slightly red ⓘ |
| surfaceComposition |
carbonaceous material
ⓘ
water ice ⓘ |
| surfaceFeature | shows water-ice absorption bands in spectrum ⓘ |
| systemType | binary system with Vanth ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Kuiper Belt object