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Discovery and designation
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| Discovered by | Purple Mountain Observatory |
| Discovery site | Nanking |
| Discovery date | October 10, 1977 |
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Designations
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| MPC designation | 3187 |
| Named after | Dalian |
| Alternate name(s) | 1977 TO3 |
| Epoch May 14, 2008 | |
| Ap | 2.4145922 |
| Peri | 2.1522300 |
| Eccentricity | 0.0574496 |
| Orbital period | 1260.3019179 |
| Mean anomaly | 277.94610 |
| Inclination | 2.75723 |
| Longitude of ascending node | 312.47097 |
| Argument of peri | 105.68434 |
| Absolute magnitude (H) | 13.7 |
3187 Dalian (1977 TO3) is a main-belt asteroid discovered on October 10, 1977 by Purple Mountain Observatory at Nanking.
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