The Crescent Nebula (NGC6888) in Cygnus
with 10" f/3.9 Astrograph
Uploaded 8/9/20

 
This
            Super Nova Remnant is quite faint and in a very rich and bright
            starfield.

            
Select an image size for a larger view

1400 x 1200:


Instrument:  10" f/3.9 Orion Astrograph Newtonian with Baader MPCC
Mount:  Astrophysics 1200 QMD
CCD Camera:  SBIG 10XME NABG with Enhanced Water Cooling
Guider: Zwo ASI mini  w/80mm piggyback refractor
Exposure:  LRGB = 95:10:10:10
AstroDon RGB Combine Ratio:  1: 1.05: 1.2
Location:  Payson, Arizona, Elevation:  5150 ft.
Sky:  Seeing FWHM = 3 arcsec , Transparency 7/10
Outside Temperature:  75 F
CCD Temperature:  -20 C
Image Processing Tools: 
Maxim DL6:  Calibration, deblooming (Starizona Debloomer), aligning, stacking
PixInsight:  Curves, Deconvolution
Photoshop CS2:  Curves, Color Correction, Gradient removal (Grad Xterminator), Cleanup

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