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Discovery and designation
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| Discovered by | E. F. Helin |
| Discovery site | Palomar Observatory |
| Discovery date | September 26, 1973 |
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Designations
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| MPC designation | 2128 |
| Named after | George Wetherill |
| Alternate name(s) | 1973 SB |
| Epoch May 14, 2008 | |
| Ap | 3.7774179 |
| Peri | 1.6826565 |
| Eccentricity | 0.3836507 |
| Orbital period | 1647.5980081 |
| Mean anomaly | 250.02569 |
| Inclination | 16.91729 |
| Longitude of ascending node | 358.49925 |
| Argument of peri | 331.94308 |
| Absolute magnitude (H) | 13.6 |
2128 Wetherill (1973 SB) is a main-belt asteroid discovered on September 26, 1973 by E. F. Helin at Palomar Observatory.
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