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Discovery and designation
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| Discovered by | H. E. Holt |
| Discovery site | Palomar |
| Discovery date | September 15, 1990 |
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Designations
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| MPC designation | 5185 |
| Alternate name(s) | 1990 RV2 |
| Epoch May 14, 2008 | |
| Ap | 2.8962348 |
| Peri | 2.4562018 |
| Eccentricity | 0.0822117 |
| Orbital period | 1599.1187789 |
| Mean anomaly | 303.22864 |
| Inclination | 8.38157 |
| Longitude of ascending node | 216.52598 |
| Argument of peri | 217.73069 |
| Geometric albedo | 0.1408 |
| Absolute magnitude (H) | 12.20 |
5185 Alerossi (1990 RV2) is a main belt asteroid discovered on September 15, 1990 by H. E. Holt at Palomar.
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