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Discovery and designation
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| Discovered by | A. R. Klemola |
| Discovery site | Mount Hamilton |
| Discovery date | April 20, 1977 |
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Designations
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| MPC designation | 2261 |
| Named after | James Edward Keeler |
| Alternate name(s) | 1977 HC |
| Epoch May 14, 2008 | |
| Ap | 2.9437882 |
| Peri | 1.8099584 |
| Eccentricity | 0.2385129 |
| Orbital period | 1338.4664016 |
| Mean anomaly | 169.96714 |
| Inclination | 22.71966 |
| Longitude of ascending node | 102.90290 |
| Argument of peri | 99.12539 |
| Absolute magnitude (H) | 12.8 |
2261 Keeler (1977 HC) is a main-belt asteroid discovered on April 20, 1977 by A. R. Klemola at Mount Hamilton. It is named for the astronomer James Edward Keeler, who also discovered two asteroids (452 Hamiltonia and (20958) A900 MA in 1899 and 1900)
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