The Cocoon Nebula in Cygnus

Uploaded 8/26/2001

This deep exposure of the combination emission and reflection nebula in the Swan is a very low surface brightness object, requiring a low noise, dark sky, and longer exposure times. A total of 3h 10m of imaging time was needed to bring out the rich red core and outer blue halo of reflection nebulosity.

CR470 is the open cluster in the center of the nebula, while Sharpless 125 is the nebula itself. The cluster is listed at 11 mins in size, however it is larger if you count the blue halo.

Processing: Calibration - Maxim DL, ME Deconvolution - Maxim DL, RGB combine - Maxim, Registration - PW Pro, LRGB combine - Photoshop 6.

Instrument:  12.5" f/5 Home made Newtonian
CCD Camera:  SBIG ST7E w/Enhanced Cooling
Exposure:  LRGB = 130:20:20:20 (RGB Binned 2x2)
Filters:  RGB Tricolor
Location:  Payson, Arizona
Elevation:  5150 ft.
Sky:  Seeing 6/10, Transparency 8/10
Outside Temperature:  20 C
CCD Temperature:  -20 C
Processing:  Maxim DL, Photoshop, PW Pro.




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