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Discovery and designation
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| Discovered by | S. J. Bus |
| Discovery site | Siding Spring Observatory |
| Discovery date | March 2, 1981 |
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Designations
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| MPC designation | 5309 |
| Alternate name(s) | 1981 ED25 |
| Epoch May 14, 2008 | |
| Ap | 2.7789216 |
| Peri | 1.7246770 |
| Eccentricity | 0.2340894 |
| Orbital period | 1234.2210834 |
| Mean anomaly | 241.22494 |
| Inclination | 4.04173 |
| Longitude of ascending node | 202.38231 |
| Argument of peri | 124.95337 |
| Absolute magnitude (H) | 14.1 |
5309 MacPherson (1981 ED25) is a main-belt asteroid discovered on March 2, 1981 by S. J. Bus at Siding Spring Observatory in the course of the U.K. Schmidt-Caltech Asteroid Survey.
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