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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 | 22857 |
| Alternate name(s) | 1999 RJ143 |
| Epoch May 14, 2008 | |
| Ap | 2.5326095 |
| Peri | 1.9719235 |
| Eccentricity | 0.1244715 |
| Orbital period | 1234.6051596 |
| Mean anomaly | 84.39925 |
| Inclination | 6.08011 |
| Longitude of ascending node | 174.23004 |
| Argument of peri | 316.28066 |
| Absolute magnitude (H) | 15.3 |
22857 Hyde (1999 RJ143) 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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