21561 Masterman
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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 | August 28, 1998 |
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Designations
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| MPC designation | 21561 |
| Alternative names[1] | 1998 QR93 |
| Epoch May 14, 2008 | |
| Ap | 3.1302322 |
| Peri | 2.2359228 |
| Eccentricity | 0.1666574 |
| Orbital period | 1605.2705670 |
| Mean anomaly | 72.31870 |
| Inclination | 13.95728 |
| Longitude of ascending node | 57.90037 |
| Argument of peri | 334.07601 |
| Absolute magnitude | 12.8 |
21561 Masterman (1998 QR93) is a Main-belt Asteroid discovered on August 28, 1998 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
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