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Discovery and designation
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| Discovered by | Lincoln Laboratory Near-Earth Asteroid Research Team |
| Discovery site | Socorro |
| Discovery date | September 1, 2000 |
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Designations
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| MPC designation | 20780 |
| Alternate name(s) | 2000 RO11 |
| Epoch May 14, 2008 | |
| Ap | 2.8864975 |
| Peri | 2.1909233 |
| Eccentricity | 0.1369936 |
| Orbital period | 1477.4683006 |
| Mean anomaly | 310.13579 |
| Inclination | 6.49812 |
| Longitude of ascending node | 182.38938 |
| Argument of peri | 244.86175 |
| Absolute magnitude (H) | 14.7 |
20780 Chanyikhei (2000 RO11) is a main-belt asteroid discovered on September 1, 2000 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. It was named after Chan Yik Hei, a science amateur from Hong Kong who achieved a Second Award in Engineering Category of the Intel International Science and Engineering Fair in 2004, under the Ceres Connection program.
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