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Discovery and designation
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|---|---|
| Discovered by | Y. Vaisala |
| Discovery site | Turku |
| Discovery date | April 9, 1940 |
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Designations
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| MPC designation | 2639 |
| Alternate name(s) | 1940 GN |
| Epoch May 14, 2008 | |
| Ap | 2.9139029 |
| Peri | 1.9785833 |
| Eccentricity | 0.1911747 |
| Orbital period | 1397.4872093 |
| Mean anomaly | 254.59724 |
| Inclination | 9.66295 |
| Longitude of ascending node | 79.30392 |
| Argument of peri | 167.23076 |
| Absolute magnitude (H) | 12.9 |
2639 Planman (1940 GN) is a main-belt asteroid discovered on April 9, 1940 by Y. Vaisala at Turku.
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