Cygnus Loop (Gary Imm)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: 52 Cyg · HD197702 · HD197839 · HD198198 · HD198313 · HD198330 · HD198425 · HD198482 · HD198526 · HD198550 · HD198626 · HD198627 · HD198821 · HD198976 · HD199055 · HD199102 · HD199291 · HD199695 · HD199717 · HD199763 · HD199837 · HD199912 · IC 1340 · LBN 191 · LDN 868 · NGC 6960 · NGC 6974 · NGC 6979 · NGC 6992 · NGC 6995 · And 3 more.

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Cygnus Loop

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Cygnus Loop

This object is the famous Cygnus Loop, a large supernova remnant (SNR) about 1,500 light-years away in the constellation of Cygnus the Swan at a declination of +31 degrees. It is also known as the Veil Nebula Complex. This SNR includes the Eastern Veil and Southeastern Knot on the left, Pickering's Triangle and NGC 6974 at the top, and the Witch's Broom Nebula (Western Veil) on the right.

The bright foreground star near the center of the right edge of the image is 52 Cygnus. This magnitude 4 star is only 200 light years away and is not associated with the supernova remnant.

Astronomers estimate that the supernova explosion that produced the nebula occurred between 3,000 BC and 6,000 BC. The image covers an area of about 36 times the size of the full moon and required a 2 panel RASA mosaic to capture it here.

The spherical nature of the expanding supernova remnant is easy to see in this image. The progenitor star of this supernova explosion has not been found. It may have been destroyed in the explosion.

The spindly filaments of hydrogen and oxygen that outline the gas shock fronts throughout this region are one of my favorite DSO objects.

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Please note: The following tables are updated every 24 hours.

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	8153100
PixInsight job	T2JMWRAY0WCN79JGL2Y92HFFW7PU2DRD
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h51m24s.31
RA (top/left)	20h59m16s.90
RA (top/right)	20h44m02s.24
RA (bottom/right)	20h43m51s.51
RA (bottom/left)	20h58m29s.29

Dec (center)	+30°34′48″.5
Dec (top/left)	+32°27′17″.8
Dec (top/right)	+32°32′30″.3
Dec (bottom/right)	+28°40′24″.3
Dec (bottom/left)	+28°35′24″.4

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Cygnus Loop

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Cygnus Loop

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