This is Comet C/2021 A1 (Leonard), photographed on Oct 27, 2021 through a 60mm APO doublet refractor. I stacked 17 x 3 min to show the comet's motion against the star field in URSA Major.

Acquisition details on astrobin:

www.astrobin.com/5xkbqw/

A hint of sunrise on the horizon: Comet Leonard seen from Old Heath in Colchester, England, on Saturday 11 December 2021. Nikon D750, Nikkor 70-200mm at 70mm, ISO1000, F2.8, 73 frames stacked in Starry Sky Stacker from 81 lights and 27 darks, processed in Photoshop and Lightroom.

This is Comet C/2021 A1 (Leonard), photographed on Nov 3, 2021 through a 60mm APO doublet refractor. I stacked 40 x 3 min to show the comet's motion against the star field in URSA major over the course of 2 hours.

Fuller details on astrobin:

www.astrobin.com/w7e57d/

Comet C/2021 A1 (Leonard), Jan 2 2022, 02:00-02:08 UTC. 90x5s aligned and stacked with gmic and gimp, with heavy contrast stretch. Exif is from a single frame. Timelapse flic.kr/p/2mURxU6

Comet C/2021 A1 (Leonard), Dec 19 2021, 01:40-01:50 UTC. 100x5s aligned and stacked with gmic and gimp. Exif is from a single frame. Trees also from a single frame.

Comet C/2021 A1 (Leonard), Jan 3 2022, 02:00-02:18 UTC. 160x6s aligned and stacked with gmic and gimp. Exif is from a single frame.

Comet C/2021 A1 (Leonard), Jan 1 2022, 01:50-02:00 UTC. 100x5s aligned and stacked with gmic and gimp, with heavy contrast stretch. Exif is from a single frame.

Comet C/2021 A1 (Leonard), Jan 3 2022, 02:00-02:18 UTC. 160x6s aligned and stacked with gmic and gimp. Exif is from a single frame.

Comet C/2021 A1 (Leonard) inverted grayscale, Jan 3 2022, 02:00-02:18 UTC. 160x6s aligned and stacked with gmic and gimp. Exif is from a single frame.

Comet C/2021 A1 (Leonard), Dec 31 2021, 01:45-01:55 UTC. 100x5s, aligned and stacked with gmic and gimp. Heavily stretched. Exif is from a single frame.