(69990) 1998 WU31

(69990) 1998 WU₃₁
Discovery
Discovered by	Marc W. Buie
Discovery date	November 18, 1998
Designations
MPC designation	(69990) 1998 WU₃₁
Alternative names	none
Minor planet category	TNO (plutino)
Orbital characteristics
Aphelion	46.268 AU
Perihelion	31.885 AU
Semi-major axis	39.077 AU
Eccentricity	0.184
Mean anomaly	34.1°
Inclination	6.6°
Longitude of ascending node	237.2°
Argument of perihelion	140.9°
Physical characteristics
Dimensions	111 km
Albedo	0.09 (assumed)
Absolute magnitude (H)	8.0

(69990) 1998 WU₃₁, also written as (69990) 1998 WU31 is a TNO that resides in the Kuiper belt. It was discovered on November 18, 1998, by Marc W. Buie at Kitt Peak National Observatory

Since it is in a 2:3 orbital resonance with the planet Neptune, it has been classified as a plutino.

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(69989) 1998 WK31 (69990) 1998 WU₃₁ (69991) 1998 WP32

References

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Asteroids	Aten asteroid Families Jupiter Trojans Main-belt Near-Earth Spectral types

Distant minor planets	Centaurs Damocloids Neptune trojans Trans-Neptunian objects Detached Kuiper belt Oort cloud Scattered disc

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Trans-Neptunian objects

TNO classes	Cubewanos Scattered-disc objects Detached objects Resonant objects (Neptune trojans Plutinos Twotinos) Natural satellites Double objects

Dwarf Planets (moons)	Pluto Charon Styx Nix Kerberos Hydra Haumea Namaka Hi'iaka Makemake Eris Dysnomia

Sednoids	90377 Sedna 2012 VP113

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