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Discovery and designation
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| Discovered by | Lincoln Laboratory Near-Earth Asteroid Research Team |
| Discovery site | Socorro |
| Discovery date | December 6, 1999 |
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Designations
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| MPC designation | 13840 |
| Alternate name(s) | 1999 XW31 |
| Epoch May 14, 2008 | |
| Ap | 2.7812178 |
| Peri | 2.0558102 |
| Eccentricity | 0.1499697 |
| Orbital period | 1373.7931180 |
| Mean anomaly | 111.33697 |
| Inclination | 2.14922 |
| Longitude of ascending node | 252.77426 |
| Argument of peri | 193.61126 |
| Absolute magnitude (H) | 14.1 |
13840 Wayneanderson (1999 XW31) is a main-belt asteroid discovered on December 6, 1999 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
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