21633 Hsingpenyuan
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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 13, 1999 |
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Designations
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| MPC designation | 21633 |
| Alternative names[1] | 1999 NW11 |
| Epoch May 14, 2008 | |
| Ap | 2.5729748 |
| Peri | 2.1574970 |
| Eccentricity | 0.0878301 |
| Orbital period | 1328.6485677 |
| Mean anomaly | 211.36526 |
| Inclination | 5.61485 |
| Longitude of ascending node | 305.16125 |
| Argument of peri | 304.60360 |
| Absolute magnitude | 14.3 |
21633 Hsingpenyuan (1999 NW11) is a Main-belt Asteroid discovered on July 13, 1999 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
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