21989 Werntz
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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 5, 1999 |
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Designations
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| MPC designation | 21989 |
| Alternative names[1] | 1999 XU20 |
| Epoch May 14, 2008 | |
| Ap | 3.6840963 |
| Peri | 2.5516367 |
| Eccentricity | 0.1816081 |
| Orbital period | 2010.8732385 |
| Mean anomaly | 175.67365 |
| Inclination | 3.81336 |
| Longitude of ascending node | 189.99102 |
| Argument of peri | 244.46944 |
| Absolute magnitude | 14.3 |
21989 Werntz (1999 XU20) is a Main-belt Asteroid discovered on December 5, 1999 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
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