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Discovery and designation
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| Discovered by | Shoemaker, C. |
| Discovery site | Palomar |
| Discovery date | May 31, 1987 |
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Designations
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| MPC designation | 3906 |
| Named after | Edward C. T. Chao |
| Alternate name(s) | 1987 KE1 |
| Epoch May 14, 2008 | |
| Ap | 3.1372465 |
| Peri | 2.7277577 |
| Eccentricity | 0.0698190 |
| Orbital period | 1834.2390058 |
| Mean anomaly | 331.83555 |
| Inclination | 26.07232 |
| Longitude of ascending node | 149.22836 |
| Argument of peri | 204.37664 |
| Geometric albedo | 0.0381 |
| Absolute magnitude (H) | 10.80 |
3906 Chao (1987 KE1) is a main-belt asteroid discovered on May 31, 1987 by Shoemaker, C. at Palomar.
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