21640 Petekirkland
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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 | July 14, 1999 |
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Designations
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| MPC designation | 21640 |
| Alternative names[1] | 1999 NX39 |
| Epoch May 14, 2008 | |
| Ap | 2.6887413 |
| Peri | 1.8658451 |
| Eccentricity | 0.1806742 |
| Orbital period | 1255.2402357 |
| Mean anomaly | 124.59423 |
| Inclination | 5.81793 |
| Longitude of ascending node | 356.44959 |
| Argument of peri | 51.27701 |
| Absolute magnitude | 14.6 |
21640 Petekirkland (1999 NX39) is a Main-belt Asteroid discovered on July 14, 1999 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
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