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Discovery and designation
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| Discovered by | E. F. Helin |
| Discovery site | Palomar |
| Discovery date | September 23, 1992 |
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Designations
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| MPC designation | 8378 |
| Alternate name(s) | 1992 SN1 |
| Epoch May 14, 2008 | |
| Ap | 3.1068424 |
| Peri | 2.0410078 |
| Eccentricity | 0.2070446 |
| Orbital period | 1508.3157848 |
| Mean anomaly | 265.71261 |
| Inclination | 15.08672 |
| Longitude of ascending node | 11.35102 |
| Argument of peri | 27.48417 |
| Absolute magnitude (H) | 12.7 |
8378 Sweeney (1992 SN1) is a main-belt asteroid discovered on September 23, 1992 by E. F. Helin at Palomar.
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