Comet C/2020 F3 NEOWISE, July 9th, 2020 (Astrotracer) (AlenK)

Celestial hemisphere: Northern · Constellation: Auriga (Aur)

Comet C/2020 F3 NEOWISE, July 9th, 2020 (Astrotracer), AlenK

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Comet C/2020 F3 NEOWISE, July 9th, 2020 (Astrotracer)

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Comet C/2020 F3 NEOWISE, July 9th, 2020 (Astrotracer)

My intention on the morning of July 9 was to get at least 15 minutes on the comet within a window of opportunity spanning perhaps 30 before the sky brightened too much. I actually got barely 3 minutes of immediately usable frames, which are in this image, because of the muck near the horizon, a badly positioned cloud bank and difficulty choosing the correct ISO as the sky continually brightened.

I saturated the comet's nucleus in many shots that I did not include in this stack. However, with careful masking I could include them and pull more detail from the comet, in particular to better show the gas tail that is on the verge of being visible here.

Tracking was performed internally in the camera using the Astrotracer feature, with the lens mounted directly to a tripod. The lens was stopped down to f/5.8 externally using a 77mm-to-52mm step-down ring. No darks, bias or flats.

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Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

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.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Basic success
Started	...
Astrometry.net job	3658971
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Comet C/2020 F3 NEOWISE, July 9th, 2020 (Astrotracer)

Comet C/2020 F3 NEOWISE, July 9th, 2020 (Astrotracer)

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Image Index:

Contribution Index (beta):

Comet C/2020 F3 NEOWISE, July 9th, 2020 (Astrotracer)

Comet C/2020 F3 NEOWISE, July 9th, 2020 (Astrotracer)

Equipment

Acquisition details

Description

Comments

Sky plot

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