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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 | September 9, 1999 |
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Designations
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| MPC designation | 19660 |
| Alternate name(s) | 1999 RQ129 |
| Epoch May 14, 2008 | |
| Ap | 2.5804024 |
| Peri | 2.0705492 |
| Eccentricity | 0.1096234 |
| Orbital period | 1295.2874779 |
| Mean anomaly | 34.82205 |
| Inclination | 7.32244 |
| Longitude of ascending node | 143.80546 |
| Argument of peri | 323.91851 |
| Absolute magnitude (H) | 15.3 |
19660 Danielsteck (1999 RQ129) is a main-belt asteroid discovered on September 9, 1999 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
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