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Discovery
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|---|---|
| Discovered by | Y. Vaisala |
| Discovery site | Turku |
| Discovery date | September 21, 1938 |
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Designations
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| MPC designation | 1928 |
| Alternate name(s) | 1938 SO |
| Epoch May 14, 2008 | |
| Ap | 2.9780244 |
| Peri | 1.9780176 |
| Eccentricity | 0.2017753 |
| Orbital period | 1424.8065469 |
| Mean anomaly | 319.16252 |
| Inclination | 4.56759 |
| Longitude of ascending node | 180.61335 |
| Argument of peri | 157.25328 |
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Physical characteristics
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| Absolute magnitude (H) | 12.68 |
1928 Summa (1938 SO) is a main-belt asteroid discovered on September 21, 1938 by Y. Vaisala at Turku.
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