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Discovery and designation
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| Discovered by | L. I. Chernykh |
| Discovery site | Crimean Astrophysical Observatory |
| Discovery date | September 27, 1973 |
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Designations
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| MPC designation | 2186 |
| Named after | Mstislav Keldysh |
| Alternate name(s) | 1973 SQ4 |
| Epoch May 14, 2008 | |
| Ap | 2.9518297 |
| Peri | 2.4089417 |
| Eccentricity | 0.1012705 |
| Orbital period | 1602.8555049 |
| Mean anomaly | 290.79989 |
| Inclination | 2.37174 |
| Longitude of ascending node | 285.46583 |
| Argument of peri | 133.09610 |
| Absolute magnitude (H) | 12.3 |
2186 Keldysh (1973 SQ4) is a main-belt asteroid discovered on September 27, 1973 by L. I. Chernykh at the Crimean Astrophysical Observatory.
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