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Discovery and designation
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| Discovered by | T. M. Smirnova |
| Discovery site | Crimean Astrophysical Observatory |
| Discovery date | November 2, 1975 |
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Designations
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| MPC designation | 4139 |
| Alternate name(s) | 1975 VE2 |
| Epoch May 14, 2008 | |
| Ap | 3.6798163 |
| Peri | 2.6019511 |
| Eccentricity | 0.1715863 |
| Orbital period | 2033.1818669 |
| Mean anomaly | 355.35380 |
| Inclination | 1.59119 |
| Longitude of ascending node | 134.15908 |
| Argument of peri | 181.51746 |
| Absolute magnitude (H) | 11.8 |
4139 Ul'yanin (1975 VE2) is a main-belt asteroid discovered on November 2, 1975 by T. M. Smirnova at the Crimean Astrophysical Observatory.
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