These pictures were obtained near 8:30 pm last night with the temperature in the low 20's F. The eventual low was about 5° F the next morning. Temperatures this low are a problem for doing polar alignment of the star tracking mount, because the green laser that is used for lining up on Polaris does not work well in the cold.
The camera used was a Sony A7iii + Rokinon AF 85mm f/1.4 FEII lens + Hoya Softon filter. The measured sky brightness was sqml=21.31 mpsas. Some faint red airglow was evident at lower elevations.
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| Lyra |
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| credit: SkySafariAstronomy.com |
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| Cassiopeia |
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| credit: SkySafariAstronomy.com |
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| Perseus |
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| credit: SkySafariAstronomy.com |
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| Auriga |
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| credit: SkySafariAstronomy.com |
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| The Pleiades, Hyades, and Uranus (circled) |
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| credit: SkySafariAstronomy.com |
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