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Discovery
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| Discovered by | C. A. Trujillo, D. C. Jewitt, and J. X. Luu[1] |
| Discovery date | September 8, 1999 |
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Designations
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| MPC designation | (137295) 1999 RB216 |
| Alternative names | none |
| Minor planet category |
twotino |
| Aphelion | 61.184 |
| Perihelion | 33.655 AU |
| Semi-major axis | 47.420 AU |
| Eccentricity | 0.290 |
| Orbital period | 119104 d (326.09 a)[2] |
| Mean anomaly | 352.4° |
| Inclination | 12.7° |
| Longitude of ascending node | 175.7° |
| Argument of perihelion | 208.3° |
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Physical characteristics
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| Dimensions | 153 km[3] |
| Albedo | 0.09 (assumed) |
| Absolute magnitude | 7.3 |
(137295) 1999 RB216, also written as 1999 RB216, is a trans-Neptunian object that resides in the Kuiper belt. It was discovered on September 8, 1999 by Chad Trujillo, David C. Jewitt, and Jane X. Luu.
It is in a 2:1 orbital resonance with the planet Neptune.
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