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Discovery
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|---|---|
| Discovered by | Marc W. Buie |
| Discovery date | November 18, 1998 |
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Designations
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| MPC designation | (69990) 1998 WU31 |
| Alternate name(s) | none |
| Minor planet category |
TNO (plutino) |
| 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° |
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Physical characteristics
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| 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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