IC 5146 (Paul Porto)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: B168 · Cocoon Nebula · HD207886 · HD208362 · IC 5146 · LBN 424 · LDN 1055 · Sh2-125 · VdB147

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IC 5146

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IC 5146

IC 5146, also known as the Cocoon Nebula, from Borlte 1 skies at Kodachrome State Park in south-central Utah. is a beautiful and intriguing emission nebula located in the constellation Cygnus.

Nebula Type: IC 5146 is classified as an emission/reflection nebula. It consists of a combination of ionized gas, which emits light, and dust particles that reflect light from nearby stars.
IC 5146 is a region of active star formation. Within the nebula, new stars are being born from the dense gas and dust clouds. These young stars often exhibit a blue color, indicating their youth and high surface temperatures.
Estimated to be located around 4,000 light-years away from Earth. Its relatively close proximity makes it a popular target for both amateur and professional astronomers.
Embedded within IC 5146 is a young star cluster known as Collinder 470. This cluster consists of recently formed stars that are still gravitationally bound to each other. The presence of the star cluster adds to the overall beauty and interest of the nebula.
The stars within IC 5146, including those in Collinder 470, provide the illumination for the nebula. Their intense ultraviolet radiation ionizes the surrounding gas, causing it to emit the characteristic reddish glow seen in the nebula.
Dark Nebulae: IC 5146 is surrounded by dark nebulae, such as Barnard 168, which create contrasting patches of dark, opaque regions against the background of the bright nebula. These dark nebulae are composed of dense interstellar dust and gas, blocking the light from background stars.

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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	7748502
PixInsight job	ZX2A4UOBNI7CGMTZ4RNHL4H218F96HLH
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h52m39s.14
RA (top/left)	21h56m16s.46
RA (top/right)	21h53m14s.67
RA (bottom/right)	21h48m58s.76
RA (bottom/left)	21h52m04s.59

Dec (center)	+47°19′57″.1
Dec (top/left)	+46°55′40″.3
Dec (top/right)	+48°03′44″.1
Dec (bottom/right)	+47°43′45″.7
Dec (bottom/left)	+46°36′08″.5

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IC 5146

IC 5146

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Image Index:

Contribution Index (beta):

IC 5146

IC 5146

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