Hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Cocoon Nebula  ·  IC 5146
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IC 5146, The Cocoon Nebula, Caldwell 19, SH2-125, 



    
        

            Steven Bellavia
IC 5146, The Cocoon Nebula, Caldwell 19, SH2-125
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IC 5146, The Cocoon Nebula, Caldwell 19, SH2-125

Getting plate-solving status, please wait...
IC 5146, The Cocoon Nebula, Caldwell 19, SH2-125, 



    
        

            Steven Bellavia
IC 5146, The Cocoon Nebula, Caldwell 19, SH2-125
Powered byPixInsight

IC 5146, The Cocoon Nebula, Caldwell 19, SH2-125

Technical card

Imaging telescopes or lenses: Williams Optics FLT 91 Triplet Apo

Imaging cameras: ZWO ASI 294MM Pro (cooled)

Mounts: Sky-Watcher EQ-6R Pro SynScan

Guiding telescopes or lenses: The Bellavia Basic-II 50mm f/7.5 guidescope

Guiding cameras: ZWO ASI 290MC

Focal reducers: William Optics Flat6AIII

Software: Digital Photo Professional  ·  SharpCap Pro 4.0  ·  Pleiades Astrophoto PixInsight  ·  IDEIKI AstroPhotography Tool (APT)  ·  Topaz Denoise AI  ·  Noel Carboni's Astro Tools for PhotoShop Noel Carboni Actions  ·  PHD2 Guiding

Filters: Astronomik 6nm Ha  ·  L


Dates:Aug. 24, 2021

Frames:
Astronomik 6nm Ha: 25x240" (1h 40') (gain: 150.00) -10C bin 1x1
L: 24x60" (24') (gain: 100.00) -10C bin 1x1

Integration: 2h 4'

Darks: 30

Flats: 30

Flat darks: 30

Avg. Moon age: 16.80 days

Avg. Moon phase: 95.40%

Bortle Dark-Sky Scale: 4.00

Mean SQM: 19.00

Mean FWHM: 2.90

Temperature: 20.00


Basic astrometry details

Astrometry.net job: 4931649

RA center: 21h53m19s.9

DEC center: +47°1640

Pixel scale: 1.097 arcsec/pixel

Orientation: 176.005 degrees

Field radius: 0.549 degrees


Resolution: 3000x2000

Data source: Backyard

Description

IC 5146 (also Caldwell 19, Sh 2-125, and the Cocoon Nebula) is a reflection/emission nebula and Caldwell object in the constellation Cygnus.  The cluster is also known as Collinder 470. Its magnitude is estimated between 7.2 to 10.0 

It is located near the naked-eye star Pi Cygni, the open cluster NGC 7209 in Lacerta, and the bright open cluster M39. The cluster 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.

When viewing IC 5146, dark nebula Barnard 168 ( B168 )  is visible, forming a dark lane that surrounds the cluster and projects westward forming the appearance of a trail behind the Cocoon.

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  • IC 5146, The Cocoon Nebula, Caldwell 19, SH2-125, 



    
        

            Steven Bellavia
    Original
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    IC 5146, The Cocoon Nebula, Caldwell 19, SH2-125, 



    
        

            Steven Bellavia
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IC 5146, The Cocoon Nebula, Caldwell 19, SH2-125, 



    
        

            Steven Bellavia