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Discovery and designation
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| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg |
| Discovery date | August 28, 1936 |
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Designations
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| MPC designation | (5657) 1936 QE1 |
| Alternate name(s) | 1986 RUI |
| Minor planet category |
main belt asteroid |
| Ap | 3.0168958 AU |
| Peri | 2.1574414 AU |
| Semi-major axis | 2.5871686 AU |
| Eccentricity | 0.1660994 AU |
| Orbital period | 4.16 yrs. |
| Mean anomaly | 58.90694 deg. |
| Inclination | 14.13965 deg. |
| Longitude of ascending node | 166.79916 deg. |
| Absolute magnitude (H) | 12.8 mag |
5657 Groombridge is an asteroid discovered by Karl Wilhelm Reinmuth at Heidelberg on August 28, 1936.
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