GALLERY

New release with 12" RC telescope

IC 5146 (LBN 424, Sh 2-125, Cocoon Nebula) and vdB 147 - Cluster associated with nebulosity in Cygnus

LRGB combination (Click for a larger view 1500 x 1500 px)

 

Details

IC 5146 (LBN 424, Sh 2-125, Cocoon Nebula) and vdB 147 - Cluster associated with nebulosity in Cygnus

IC 5146 (LBN 424, Sh 2-125) 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. The nebula is nearly 15 light-years wide, located about 4000 light years away. Like other star forming regions, it stands out in red, glowing, hydrogen gas excited by young, hot stars and blue, dust-reflected starlight at the edge of an otherwise invisible molecular cloud. The bright star near the center of the nebula is a few hundred thousand years old, powering the nebular glow in the molecular cloud. Close to the right is the reflection nebula vdB 147.

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): RC 12" with Astro-Physics corrector @ f/5
Mount: ASA DDM85 Premium
Camera: ATIK 4000 - monochrome CCD – 2048 x 2048 px ; 16x16 mm; 7.4 µm x 7.4 µm
Filters: Astronomik L, R, G, B set, SupaSlim TrueTechnology Computerized Filter Wheel
Dates/Times: 2012-08-14
Location: Rozhen Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exposure Details:

L=40 min, R = 40 min, G = 30 min, B = 30 min (Bin 1), subs. 10 min, Total Exposure Time - 140 min

More details: Dark and flat frames reduction
Guiding: All subexposures are unguided
Processing:

PixInsight / PS

GALLERY


All Contents copyright Velimir Popov unless otherwise noted.