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Discovery and designation
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| Discovered by | T. Nomura and K. Kawanishi |
| Discovery site | Minami-Oda |
| Discovery date | December 8, 1990 |
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Designations
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| MPC designation | 5685 |
| Alternate name(s) | 1990 XA |
| Epoch May 14, 2008 | |
| Ap | 3.0613372 |
| Peri | 2.5364056 |
| Eccentricity | 0.0937756 |
| Orbital period | 1710.3020949 |
| Mean anomaly | 172.44455 |
| Inclination | 7.71761 |
| Longitude of ascending node | 277.07981 |
| Argument of peri | 268.35935 |
| Absolute magnitude (H) | 11.7 |
5685 Sanenobufukui (1990 XA) is a main-belt asteroid discovered on December 8, 1990 by T. Nomura and K. Kawanishi at Minami-Oda.
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