C/2021 A1 (Leonard) in a galaxy field (DanielZoliro)

Celestial hemisphere: Northern · Constellation: Coma Berenices (Com) · Contains: Solar system body or event

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C/2021 A1 (Leonard) in a galaxy field

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C/2021 A1 (Leonard) in a galaxy field

This image was taken on November 30 and consisted of 220 subs at 30 seconds each. Processing was difficult as the comet is still moving fairly slow in relation to the stars, so I had a hard time getting rid of star streaks when integrating the comet aligned frames in Pixinsight. I ended up using a "sieve" process that I read about on Cloudy Nights. It involves separating the subs into groups in which there is enough distance between the stars in each frame to allow ImageIntegration to reject most of the star signal. I had to make 20 different groups and made 20 stacked frames which I then stacked together for the final comet master frame. It was very time consuming, but I think it worked out fairly well.

Original
Final
B

B

Description: Smoothed the noise a bit, and fixed an issue near the nucleus of the comet due to artifacts from the star aligned master leaving parts of the nucleus behind when integrating.

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Status	Advanced success
Started	...
Astrometry.net job	5282361
PixInsight job	P5NFDKBL2X6VIDOEZD1OALGTXZ6L9BWN
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	13h15m19s.38
RA (top/left)	13h12m48s.27
RA (top/right)	13h16m11s.86
RA (bottom/right)	13h17m49s.72
RA (bottom/left)	13h14m27s.50

Dec (center)	+30°29′28″.0
Dec (top/left)	+30°48′12″.6
Dec (top/right)	+31°05′16″.5
Dec (bottom/right)	+30°10′32″.2
Dec (bottom/left)	+29°53′36″.6

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C/2021 A1 (Leonard) in a galaxy field

C/2021 A1 (Leonard) in a galaxy field

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C/2021 A1 (Leonard) in a galaxy field

C/2021 A1 (Leonard) in a galaxy field

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