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Discovery and designation
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| Discovered by | E. F. Helin |
| Discovery site | Palomar Observatory |
| Discovery date | May 2, 1989 |
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Designations
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| MPC designation | 8270 |
| Alternate name(s) | 1989 JF |
| Epoch May 14, 2008 | |
| Ap | 2.5533130 |
| Peri | 1.8091706 |
| Eccentricity | 0.1705777 |
| Orbital period | 1176.6685454 |
| Mean anomaly | 285.75605 |
| Inclination | 4.43285 |
| Longitude of ascending node | 0.54695 |
| Argument of peri | 281.52320 |
| Absolute magnitude (H) | 13.1 |
8270 Winslow (1989 JF) is a main-belt asteroid discovered on May 2, 1989 by E. F. Helin at Palomar Observatory.
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