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Discovery and designation
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| Discovered by | Y. Vaisala |
| Discovery site | Turku |
| Discovery date | September 7, 1942 |
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Designations
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| MPC designation | 2292 |
| Named after | Själö |
| Alternate name(s) | 1942 RM |
| Epoch May 14, 2008 | |
| Ap | 3.2422585 |
| Peri | 1.9991847 |
| Eccentricity | 0.2371625 |
| Orbital period | 1549.6362035 |
| Mean anomaly | 208.01520 |
| Inclination | 14.53664 |
| Longitude of ascending node | 172.49442 |
| Argument of peri | 129.68712 |
| Absolute magnitude (H) | 11.7 |
2292 Seili (1942 RM) is a main-belt asteroid discovered on September 7, 1942 by Y. Vaisala at Turku.
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