Comet C/2020 F3 (NEOWISE), July 13th, 2020

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I used 60 frames of the timelapse video (YouTube link) of Comet C/2020 F3 (NEOWISE) to create a still image showing some structure in both the yellow-white dust and the blue plasma tail. It is not easy to work out structure in the tails of NEOWISE, since it is most of the time low in the sky and the background is usually bright, but it is still possible with unsharp masking, although the result is quite noisy.

Exposure Data

Instrument: 4.9" f/3.8 Wright-Newtonian
F/stop: 3.8
Exposure: 60 x 10s
Camera: ZWO ASI294MC Pro
Exposure start: 2:32 MESZ
Date: July 13, 2020
Location: Niederleis, Lower Austria
Conditions: Visual limiting magnitude 5 mag, SQM-L sky brightness 20.0 mag/arcsec², seeing ?, no wind, low humidity, 10°C
Enhancement: Basic data reduction, non-linearization, local contrast enhancement, registration and combination, background flattening, stars-background separation, noise reduction, re-adding of the stars
Notes: Unguided exposures, the images were registered in post-processing on the comet's brightest spot. The comet was low near the northern horizon.