2004 DW

E313699

2004 DW is the provisional designation for Orcus, a large Kuiper Belt dwarf-planet candidate often compared to Pluto in size and orbital characteristics.

All labels observed (1)

Label Occurrences
2004 DW canonical 1

How this entity was disambiguated

Statements (47)

Predicate Object
instanceOf Kuiper Belt object
dwarf planet candidate
minor planet
plutino
trans-Neptunian object
absoluteMagnitude around 2.3
albedo moderate
alsoKnownAs 90482 Orcus
surface form: (90482) Orcus

Orcus
aphelionDistance about 49 AU
belongsToCategory plutoid candidate
resonant trans-Neptunian objects
belongsToDynamicalClass Plutino
comparedTo Pluto in orbital characteristics
Pluto in size
discoveredInYear 2004
discoveryDesignation 2004 DW
discoveryStatus confirmed minor planet
eccentricity approximately 0.22
gravitationallyInfluencedBy Neptune
hasBinarySystem Orcus–Vanth system
hasColorIndex slightly less red than Pluto
hasMeanSurfaceTemperature very low (tens of kelvin)
hasNumber 90482
hasProvisionalDesignation 2004 DW
hasSatellite Vanth
heliocentricDistanceRange roughly 30–49 AU
inclination approximately 20 degrees
isBeyond Neptune
isIn outer Solar System
mass on the order of 6×10^20 kg (approximate)
meanDiameter approximately 900 km
namedAfter Orcus
surface form: Orcus (Etruscan god of the underworld)
orbitalPeriod approximately 247 Earth years
orbitalRegion Kuiper Belt
surface form: Kuiper belt
orbitalResonanceRatio 2:3
orbitalResonanceWith Neptune
orbits Sun
perihelionDistance about 30 AU
rotationPeriod on the order of 10 hours (approximate)
satelliteOf Sun
semiMajorAxis approximately 39 AU
shape likely near-spherical
similarTo Pluto
spectralType neutral to slightly red
surfaceComposition possible ammonia-bearing compounds
water ice

How these facts were elicited

Referenced by (1)

Full triples — surface form annotated when it differs from this entity's canonical label.

Orcus hasAlternativeName 2004 DW