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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