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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 | (69988) 1998 WA31 |
| Alternate name(s) | none |
| Minor planet category |
TNO 2:5 resonance[1] |
| Aphelion | 78.179 AU |
| Perihelion | 31.473 AU |
| Semi-major axis | 54.826 AU |
| Eccentricity | 0.426 |
| Mean anomaly | 35.9° |
| Inclination | 9.5° |
| Longitude of ascending node | 20.8° |
| Argument of perihelion | 309.2° |
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Physical characteristics
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| Dimensions | 139 km[2] |
| Albedo | 0.09 (assumed) |
| Absolute magnitude (H) | 7.5 |
(69988) 1998 WA31, also written as (69988) 1998 WA31, is a Trans-Neptunian object that resides in the Kuiper belt.[3]. It was discovered on November 18, 1998 by Marc W. Buie at the Kitt Peak National Observatory.
It is in a 2:5 orbital resonance with the planet Neptune.[1]
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