IC5146 Cocoon Nebula (Johnny Qiu)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: B168 · Cocoon Nebula · HD208362 · IC 5146 · LBN 424 · LDN 1055 · PGC 167593 · PGC 167597 · Sh2-125 · VdB147

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IC5146 Cocoon Nebula

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IC5146 Cocoon Nebula

IC 5146, also known as the Cocoon Nebula, is a reflection / emission nebula located in the constellation Cygnus.

The overall shape of the Cocoon Nebula somewhat resembles a giant cocoon, hence the name. Visually, the cocoon's shell is composed of bright blue clouds of gas, formed by dust particles reflecting light from nearby bright stars. Inside the cocoon, warm shades of pink and red dominate, the influence of newborn stars within the nebula that are burning and emitting high-energy ultraviolet light, causing the surrounding gas to glow.

IC 5146 actually refers to the sparse star cluster in the central region of the nebula. Its member stars form a spectacular sprinkling of points against the nebular backdrop, adding to the dreamlike quality of this cocoon-shaped nebula. The cluster is about 100,000 years old and closely related to the nebula's dynamic development and shape.

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	8084333
PixInsight job	6JL49M2NJ3NXBUI5ISKQB4W769RFQ9FR
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h53m29s.299
RA (top/left)	21h55m02s.668
RA (top/right)	21h51m56s.389
RA (bottom/right)	21h51m56s.692
RA (bottom/left)	21h55m01s.564

Dec (center)	+47°16′24″.42
Dec (top/left)	+47°26′49″.47
Dec (top/right)	+47°26′54″.67
Dec (bottom/right)	+47°05′55″.72
Dec (bottom/left)	+47°05′46″.60

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Contribution Index (beta):

IC5146 Cocoon Nebula

IC5146 Cocoon Nebula

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Image Index:

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IC5146 Cocoon Nebula

IC5146 Cocoon Nebula

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