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IC 5146 (Cocoon Nebula) - Cluster associated with nebulosity in Cygnus

HaGB and RGB combination - spikes added (Click for a larger view 1400 x 1400 px)

 

Details

IC 5146 (Cocoon Nebula) - Cluster associated with nebulosity in Cygnus

IC 5146 (also LBN 424, Sh 2-125, Ced 198, Caldwell 19) is a reflection emission nebula in the constellation Cygnus. It is a star forming region that contains three of the major types of nebulosities: emission, reflection, and absorption.

Right Ascension 21 : 53.4 (h:m)
Declination +47 : 16 (deg:m)
Distance 4 (kly)
Brightness 7.2
Apparent Dimension 12 (arc min)

Seeing: Pickering 7 rating - Good
Optic(s): Celestron 11" Schmidt Cassegrain + Alan Gee II telecompressor @ f/6.3
Mount: CGE equatorial
Camera: Artemis Art 4021 - monochrome cooled CCD camera – 2048 x 2048 px ; 16x16 mm; 7.4 µm x 7.4 µm
Filters: Astronomics Ha, R, G, B set, SupaSlim Truetek Computerized Filter Wheel
Dates/Times: 2011-10-30
Location: Rozhen Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exposure Details:

Ha = 60 min (1x1 binning), R = 25 min, G = 20 min, B = 20 min, (2x2 binning), Subexposures Ha = 10 min, RGB = 5 min, Total Exposure Time - 125 min

More details: Dark and flat frames reduction
Guiding: Starlight Xpress Lodestar Autoguider on APO 90/600+barlow @ f/13.4
Processing:

PixInsight / PS

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