IC5146 Ha (Sergiy_Vakulenko)

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

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IC5146 Ha

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IC5146 Ha

I also wanted to shoot Cocoon at the end of the 2020 imaging season, however weather didn't agree with me, only Ha channel was captured in mediocre quality. Maybe next season I will shoot LRGB to colorize the picture and add dusty details.

IC 5146 (also Caldwell 19, Sh 2-125, and the Cocoon Nebula) is combination of reflection and emission nebula in the constellation Cygnus. The nebula is about 4,000 ly away, and the central star that lights it formed about 100,000 years ago; the nebula is about 12 arcmins across, which is equivalent to a span of 15 light years.

IC 5146 is a stellar nursery where star-formation is ongoing. Observations by both the Spitzer Space Telescope and the Chandra X-ray Observatory have collectively identified hundreds of young stellar objects. Young stars are seen in both the emission nebula, where gas has been ionized by massive young stars, and in the infrared-dark molecular cloud that forms the "tail". The most-massive stars in the region is BD +46 3474, a star of class B1 that is an estimated 14±4 times the mass of the sun.
(c) Wikipedia

Narrowband imaging
Sharpless2 Objects
Fast Newtonians
Sony 694 Images

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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.
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Status	Advanced success
Started	...
Astrometry.net job	5345698
PixInsight job	4DF9WFJG7O5BNNNU2N4FCTZL4FI9WMQX
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h52m58s.30
RA (top/left)	21h50m59s.40
RA (top/right)	21h55m14s.53
RA (bottom/right)	21h54m58s.22
RA (bottom/left)	21h50m40s.25

Dec (center)	+47°18′29″.5
Dec (top/left)	+46°59′00″.3
Dec (top/right)	+47°02′40″.5
Dec (bottom/right)	+47°37′51″.6
Dec (bottom/left)	+47°34′07″.6

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IC5146 Ha

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