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Discovery and designation
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| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg |
| Discovery date | October 18, 1931 |
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Designations
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| MPC designation | 4648 |
| Named after | Wil Tirion |
| Alternate name(s) | 1931 UE |
| Epoch May 14, 2008 | |
| Ap | 2.8401369 |
| Peri | 1.9533139 |
| Eccentricity | 0.1850072 |
| Orbital period | 1355.2700353 |
| Mean anomaly | 201.47271 |
| Inclination | 9.78399 |
| Longitude of ascending node | 319.77418 |
| Argument of peri | 122.65929 |
| Geometric albedo | 0.0614 |
| Absolute magnitude (H) | 13.20 |
4648 Tirion (1931 UE) is a main-belt asteroid discovered on October 18, 1931 by K. Reinmuth at Heidelberg, and named after Wil Tirion.
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