Pluto

E20342

Kuiper Belt object celestial body dwarf planet minor planet plutoid trans-Neptunian object

Pluto is a distant, icy dwarf planet in the Kuiper Belt known for its eccentric orbit and former status as the ninth planet of the Solar System.

Aliases (1)

Plouton ×1

Statements (58)

Predicate	Object
instanceOf	Kuiper Belt object → celestial body → dwarf planet → minor planet → plutoid → trans-Neptunian object →
albedo	about 0.52 →
aphelionDistance	about 49.3 astronomical units →
atmosphereComposition	carbon monoxide → methane → nitrogen →
axialTilt	about 120 degrees →
category	distant icy world →
color	brownish → reddish →
diameter	about 2376 km →
discoveredBy	Clyde Tombaugh →
discoveryDate	1930-02-18 →
discoverySite	Lowell Observatory →
equilibriumTemperature	about 44 K →
flybyDate	2015-07-14 →
formerStatus	ninth planet of the Solar System →
hasAtmosphere	yes →
hasGeologicalActivity	yes →
hasGlaciers	yes →
hasMountains	yes →
hasNaturalSatellite	Charon → Hydra → Kerberos → Nix → Styx →
inOrbitalResonanceWith	Neptune →
largestMoon	Charon →
locatedIn	Kuiper Belt →
mass	about 1.303e22 kg →
meanDistanceFromSun	about 39.5 astronomical units →
meanRadius	about 1188 km →
memberOf	Solar System →
mountainComposition	water ice →
namedAfter	Pluto (Roman god of the underworld) →
orbitalEccentricity	about 0.248 →
orbitalInclination	about 17 degrees →
orbitalPeriod	about 248 Earth years →
orbitalResonanceRatio	3:2 with Neptune →
orbits	Sun →
perihelionDistance	about 29.7 astronomical units →
reclassificationYear	2006 →
reclassifiedAs	dwarf planet →
reclassifiedBy	International Astronomical Union →
rotationPeriod	about 6.4 Earth days →
surfaceComposition	carbon monoxide ice → methane ice → nitrogen ice →
surfaceFeature	Sputnik Planitia → Tombaugh Regio →
surfaceGravity	about 0.063 g →
surfaceTemperature	about 33–55 K →
visitedBy	New Horizons →

Referenced by (14)

Subject (surface form when different)	Predicate
Hades ("Plouton") → Hades →	epithet
Kuiper Belt object →	example
New Horizons →	flybyOf
Solar System →	hasDwarfPlanet
(15760) 1992 QB1 →	isBeyond
Makemake →	isColderThan
Quaoar →	isSmallerThan
Hades →	latinName
The Pluto Files →	mainSubject
New Horizons →	primaryTarget
Hades →	romanEquivalent
Eris →	similarInSizeTo
Orcus →	similarTo