21861 Maryhedberg
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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 | October 12, 1999 |
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Designations
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| MPC designation | 21861 |
| Alternative names[1] | 1999 TU189 |
| Epoch May 14, 2008 | |
| Ap | 3.1003164 |
| Peri | 2.8378114 |
| Eccentricity | 0.0442067 |
| Orbital period | 1868.6490264 |
| Mean anomaly | 106.71772 |
| Inclination | 9.45930 |
| Longitude of ascending node | 285.17544 |
| Argument of peri | 248.00285 |
| Absolute magnitude | 14.6 |
21861 Maryhedberg (1999 TU189) is a Main-belt Asteroid discovered on October 12, 1999 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
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