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Discovery and designation
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| Discovered by | Duncan Waldron |
| Discovery site | Siding Spring |
| Discovery date | November 21, 1986 |
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Designations
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| MPC designation | 5577 |
| Named after | Joseph Priestley |
| Alternate name(s) | 1986 WQ2 |
| Epoch May 14, 2008 | |
| Ap | 1.9264689 |
| Peri | 1.7620979 |
| Eccentricity | 0.0445623 |
| Orbital period | 914.8290124 |
| Mean anomaly | 264.20229 |
| Inclination | 22.27409 |
| Longitude of ascending node | 97.07462 |
| Argument of peri | 227.99655 |
| Absolute magnitude (H) | 14.1 |
5577 Priestley (1986 WQ2) is an inner main-belt asteroid discovered on November 21, 1986 by Duncan Waldron at Siding Spring. It was named (following a suggestion from Robert H. McNaught) after Joseph Priestley, as co-discoverer of the element oxygen, because green emission in the aurora (astronomy), due to atomic oxygen, occurs at a wavelength of 5577 angstroms (557.7 nanometers).
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