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Discovery and designation
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| Discovered by | T. Smirnova |
| Discovery site | Nauchnyj |
| Discovery date | August 31, 1973 |
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Designations
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| MPC designation | 2172 |
| Named after | Plavsk |
| Alternate name(s) | 1973 QA2 |
| Epoch May 14, 2008 | |
| Ap | 3.2959852 |
| Peri | 2.4954974 |
| Eccentricity | 0.1382181 |
| Orbital period | 1799.8572713 |
| Mean anomaly | 318.49595 |
| Inclination | 3.32759 |
| Longitude of ascending node | 84.47974 |
| Argument of peri | 334.75242 |
| Absolute magnitude (H) | 12.1 |
2172 Plavsk (1973 QA2) is a main-belt asteroid discovered on August 31, 1973 by T. Smirnova at Nauchnyj.
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