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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