IC 5146: The Cocoon Nebula
Click on image for larger version.
||The Cocoon Nebula is made up of the open cluster IC5146 and surrounded by
nebulosity of mostly Hydrogen gas. The nebula is located at the end of a long dark nebule
B168. The cluster is made up of mostly 12th magnitude stars.
20in RC Optical Systems
telescope operating at f/8.4
Paramount ME Robotic Telescope Mount
SBIG ST10XME CCD camera with color filter wheel
color production was used to create this image.
Luminance = 90 minutes (unfiltered) + 135 minutes (Ha)
Red = 40 minutes
Green = 40 minutes
Blue = 40 minutes
The luminance is a blend of standard clear data with Ha data.
No sharpening in order to keep the background relatively smooth
(it is a rather smooth nebula).
Color data was taken during poor seeing (>3").
Minimum credit line: Julie and Jessica Garcia/Adam Block/NOAO/AURA/NSF
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