The Blue Snowball Nebula (NGC 7662) (Doug Azwell)

Celestial hemisphere: Northern · Constellation: Andromeda (And) · Contains: Blue Snowball · NGC 7662 · PK106-17.1

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The Blue Snowball Nebula (NGC 7662)

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The Blue Snowball Nebula (NGC 7662)

Also known as Caldwell 22, this planetary nebula in Andromeda is a nice object which sticks out due to its unusual bright aquamarine color versus the nearby stars which are largely yellow or orange as can be seen in this shot. It appears that this nebula is largely spherical in shape with an interior region which resembles a torus, or donut, shape. It is likely the dying nova remnant of a star which had two major eruptive events as the interior of the star collapsed upon itself. Astronomically the object spans some 16 arc-seconds, or about 0.86%, or said differently 1/116th the width of the full moon. It has an apparent magnitude of 8.6 which make it invisible to the unaided eye. At a distance estimated at 2000 to 6000 light years, it may have a width of nearly 0.8 light years. Apparently this object was either thought to have been a star or was just not visible to Charles Messier during his and his assistant, Pierre Mechain's, comprehensive search for comets in the 1760s through 1780s, as it is not included in the list of Messier objects.

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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
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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
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Northern lights
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	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
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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.
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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	5041546
PixInsight job	XEEO55M2252BL6A00AO35K1Z9R76R9WD
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	23h26m02s.577
RA (top/left)	23h24m53s.902
RA (top/right)	23h26m40s.477
RA (bottom/right)	23h27m11s.321
RA (bottom/left)	23h25m24s.529

Dec (center)	+42°32′16″.60
Dec (top/left)	+42°29′10″.62
Dec (top/right)	+42°21′17″.37
Dec (bottom/right)	+42°35′20″.90
Dec (bottom/left)	+42°43′14″.49

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The Blue Snowball Nebula (NGC 7662)

The Blue Snowball Nebula (NGC 7662)

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The Blue Snowball Nebula (NGC 7662)

The Blue Snowball Nebula (NGC 7662)

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