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Discovery and designation
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| Discovered by | Y. Oshima |
| Discovery site | Gekko Observatory |
| Discovery date | November 29, 1989 |
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Designations
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| MPC designation | 5740 |
| Named after | Tōtōmi Province |
| Alternate name(s) | 1989 WM3 |
| Epoch May 14, 2008 | |
| Ap | 3.1307464 |
| Peri | 2.1225928 |
| Eccentricity | 0.1919072 |
| Orbital period | 1554.9148634 |
| Mean anomaly | 118.07865 |
| Inclination | 13.53698 |
| Longitude of ascending node | 49.26098 |
| Argument of peri | 19.13033 |
| Absolute magnitude (H) | 12.7 |
5740 Toutoumi (1989 WM3) is a main-belt asteroid discovered on November 29, 1989 by Y. Oshima at the Gekko Observatory.
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