Whale of a Comet (Andrew Burwell)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: NGC 4627 · NGC 4631 · NGC 4656 · NGC 4657 · Whale Galaxy

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Whale of a Comet

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Whale of a Comet

I had two clear nights from my back yard to spend some time imaging. I started out wanting to add more hours to my Markarian's Chain image, but after a few subs I noticed it was too late in the night to get much data on it. Instead I decided to aim nearby and lower in the horizon at the Whale Galaxy and it's partner. Unknown to me, I was to be photobombed in the middle of the night by Comet C/2020 R4 (Atlas). It moved steadily across my frames over several hours, but mostly in the luminance frames.

It's possible I could have planned this had comets been turned on in my planetarium program, but instead I won the astrophotography lottery. By sheer luck, I pointed at the right object, on the right night, and time frame to capture this triplet.

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Description: Reprocess to bring out more detail on the galaxy.

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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	Advanced success
Started	...
Astrometry.net job	5017588
PixInsight job	CPOZA9BA4GV69QJ0KGBEYAXZ4MKHFXP5
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	12h42m53s.45
RA (top/left)	12h46m43s.96
RA (top/right)	12h46m30s.83
RA (bottom/right)	12h38m56s.90
RA (bottom/left)	12h39m22s.80

Dec (center)	+32°22′40″.1
Dec (top/left)	+31°12′12″.3
Dec (top/right)	+33°35′24″.10
Dec (bottom/right)	+33°32′42″.7
Dec (bottom/left)	+31°09′34″.9

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Whale of a Comet

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Whale of a Comet

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