Fleeting Airglow Spectral Features
Taken by George Liv on May 12, 2018 @ My back yard Saint-Laurent, Quebec, Canada
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After recording countless sky-glow spectra from various areas, (see yourlightpollution.com), its the first time I recorded a night-sky spectrum with a RED 630 nm air-glow line. The green 557.7 nm line often appears on good nights in less light-polluted areas. This is from my back yard in a suburb of Montreal, Quebec, Canada, a city which can be considered extensively light polluted. Three hours later, after 3 am local time, the red line was gone while the green line was still apparent but much reduced. Note the unchanging urban lines. Nothing was visually apparent to me on this mostly clear and cool night, except the sky-glow which limits the mag near 3.5, at best.
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