Comet NEOWISE (C/2020 F3) with Green Coma

Posted by Rod Pommier
on Tuesday, July 21, 2020
This image of comet NEOWISE (C/2020 F3) taken July 19, 2020 GMT, shows significant changes from my image taken July 13, 2020 GMT (seen several posts back). The tail is no longer bifurcated. Instead, it now shows multiple streamer rays. The coma now glows teal-green, due to the gasses carbon monoxide, cyanide, and diatomic carbon being stimulated by ultraviolet sunlight.

Image Data:
Telescope/Mount: Celestron Super C8+ with f/6.3 focal reducer/corrector, Byers Drive.
Camera: Canon EOS 20D
Location: Pommier Observatory, Portland, OR, USA
Date: 2020-07-19 05:59-06:23 GMT
Exposures: Twenty-four x 15 seconds at ISO 800.

See additional astrophotographs at
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