Comet NEOWISE (C/2020 F3) on 2020-07-27

Posted by Rod Pommier
on Saturday, August 8, 2020
This image of comet NEOWISE (C/2020 F3) taken July 27, 2020 at a mean time of 07:00 UT, shows the comet
is beginning to fade from its former glory as it recedes from the sun. The tail is dimmer and less extensive than in the image from July 19, 2020 (seen several posts back). Despite this, the coma still has spectacular color, glowing teal-green due to the gasses carbon monoxide, cyanide, and diatomic carbon being stimulated by ultraviolet sunlight. The tail shows multiple streamers, one of which is the ion tail. The comet is drifting among colorful stars in the "hind legs" of the great bear, Ursa Major.

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: 2020-07-27, 07:00 UT is mean time of exposure
Exposures: Twenty-seven x 15 seconds at ISO 800.

See additional astrophotographs at
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