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Discovery and designation
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| Discovered by | N. G. Thomas |
| Discovery site | Lowell Observatory's Anderson Mesa Station |
| Discovery date | April 18, 1983 |
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Designations
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| MPC designation | 5461 |
| Alternate name(s) | 1983 HB1 |
| Epoch May 14, 2008 | |
| Ap | 3.6156994 |
| Peri | 2.6802618 |
| Eccentricity | 0.1485774 |
| Orbital period | 2040.0767409 |
| Mean anomaly | 85.31334 |
| Inclination | 12.89228 |
| Longitude of ascending node | 112.16274 |
| Argument of peri | 190.58484 |
| Geometric albedo | 0.0986 |
| Absolute magnitude (H) | 11.3 |
5461 Autumn (1983 HB1) is a main-belt asteroid discovered on April 18, 1983 by N. G. Thomas at the Lowell Observatory's Anderson Mesa Station.
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