Comet C/2020 F3 (NEOWISE) Comet-Aligned Stack (Steve Sells)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: Solar system body or event

Comet C/2020 F3 (NEOWISE) Comet-Aligned Stack

Taken 7/18/2020 at 10:31 pm PDT at Coyote Lake County Park in Santa Clara County, California. This picture is made from a sequence of 61 frames, each 5 seconds at f/2.0, ISO 100. I used the Nikon D5600's internal intervalometer to shoot the sequence as quickly as possible, one frame every 6 seconds, minimizing the movement of the comet relative to the stars. I stacked the frames, first aligned on the stars, then made another stacking aligned on the comet. I used the PixInsight module StarNet++ to remove the stars from the comet-aligned image and then again to make a star mask from the star-aligned image. In Photoshop, using the star mask, I blended the stars from the star-aligned image with the starless comet image. Then, since StarNet++ had removed most of the head of the comet when it removed the stars, I blended in the head of the comet from the original comet-aligned image.

Imaged with APT
Sky-Watcher Star Adventurer
Samyang 135 f/2

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Status	Basic success
Started	...
Astrometry.net job	3690286
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Comet C/2020 F3 (NEOWISE) Comet-Aligned Stack

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Comet C/2020 F3 (NEOWISE) Comet-Aligned Stack

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