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Discovery
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| Discovered by | Gehrels, T. |
| Discovery site | Palomar |
| Discovery date | September 19, 1973 |
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Designations
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| MPC designation | 2643 |
| Named after | Prince Bernhard of Lippe-Biesterfeld |
| Alternate name(s) | 1973 SD |
| Epoch May 14, 2008 | |
| Ap | 3.0316354 |
| Peri | 1.7220054 |
| Eccentricity | 0.2755004 |
| Orbital period | 1338.4217153 |
| Mean anomaly | 132.45295 |
| Inclination | 22.94833 |
| Longitude of ascending node | 348.62900 |
| Argument of peri | 65.75694 |
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Physical characteristics
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| Absolute magnitude (H) | 15.0 |
2643 Bernhard (1973 SD) is a main-belt asteroid discovered on September 19, 1973 by Gehrels, T. at Palomar.
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