NGC 4631 (wadeh237)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: NGC 4627 · NGC 4631

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NGC 4631

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NGC 4631

NGC 4631, The Whale Galaxy in Canes Venatici. It's also known as The Whale and the Pup, with the pup being the small galaxy directly above NGC 4631 in this image.

This is the third of three images captured at a trip to a dark sky site south of Prineville, OR in May of 2017. My priorities on the trip were M106 and NCG 5907, both targets that I've had problems capturing in the past. I was able to spend two nights on each of the priority targets which, after accounting for a night of tuning, left me with 2 final nights on sight. I decided on this target on a whim to use the last nights.

Normally, I do luminance captures on the first night and color captures on the second night. In this case, the forecast for the second night indicated much better seeing, so I did the color first. As it happened, the seeing did soften considerably from earlier in the week, and the raw subs for this image were about 3.5 arc seconds, vs near 2 arc seconds earlier. Unfortunately, it did not improve on the second night of this target as forecast, so the data is a bit soft, especially at this focal length.

Still, I am happy with the image and have used it to get more time working with PixInsight. I've especially made progress with Deconvolution processing this image.

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	Image of the day	Top pick	Top pick nominations	Total submitted
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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	1615933
PixInsight job	UPPZJGWRJCKQ8CRKF6G1P3W5O54DJS32
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	12h42m05s.550
RA (top/left)	12h43m05s.670
RA (top/right)	12h41m03s.104
RA (bottom/right)	12h41m04s.793
RA (bottom/left)	12h43m06s.815

Dec (center)	+32°31′56″.97
Dec (top/left)	+32°41′40″.50
Dec (top/right)	+32°41′16″.16
Dec (bottom/right)	+32°22′10″.60
Dec (bottom/left)	+32°22′35″.37

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NGC 4631

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