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Discovery and designation
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| Discovered by | H. E. Holt |
| Discovery site | Palomar |
| Discovery date | July 27, 1990 |
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Designations
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| MPC designation | 5642 |
| Alternate name(s) | 1990 OK1 |
| Epoch May 14, 2008 | |
| Ap | 3.0866241 |
| Peri | 1.5433459 |
| Eccentricity | 0.3333236 |
| Orbital period | 1286.5322905 |
| Mean anomaly | 3.75736 |
| Inclination | 24.98150 |
| Longitude of ascending node | 310.22840 |
| Argument of peri | 38.92306 |
| Absolute magnitude (H) | 13.5 |
5642 Bobbywilliams (1990 OK1) is a Mars-crossing asteroid discovered on July 27, 1990 by H. E. Holt at Palomar.
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