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Discovery
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| Discovered by | A. Kopff |
| Discovery site | Heidelberg |
| Discovery date | October 17, 1906 |
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Designations
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| MPC designation | 1781 |
| Named after | George Van Biesbroeck |
| Alternate name(s) | A906 UB |
| Epoch May 14, 2008 | |
| Ap | 2.6532626 |
| Peri | 2.1353692 |
| Eccentricity | 0.1081506 |
| Orbital period | 1353.2268710 |
| Mean anomaly | 146.67232 |
| Inclination | 6.94648 |
| Longitude of ascending node | 44.76596 |
| Argument of peri | 342.69844 |
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Physical characteristics
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| Absolute magnitude (H) | 12.7 |
1781 Van Biesbroeck (A906 UB) is a main-belt asteroid discovered on October 17, 1906 by A. Kopff at Heidelberg.
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