The Cocoon Nebula in Cygnus
with 10" f/3.9 Astrograph
Uploaded 11/4/20

 
This
            seriously deep shot was taken while the nebula was near the zenith
            and despite some California fire smoke still present, shows good
            depth and great color. The Cocoon nebula is the illuminated portion
            of a dark nebula that extends in this image from upper right
            to lower left. The pink portion is the hydrogen alpha emission
            which is from strong UV from the central star. It stops suddenly
            to form a circular edge in a phenomenon known as a "Stromgren
            Sphere". Outside of the pink is the blue reflection nebulosity
            component. This field is 1.5 degrees wide and is with the 10
            inch f/3.9 Astrograph and ZWO camera.

            
Select an image size for a larger view:

1400 x 1290


Instrument:  10" f/3.9 Orion Astrograph Newtonian with Baader MPCC
Mount:  Astrophysics 1200 QMD
Camera:  ZWO ASI071MC Pro Color CMOS
Guider: ZWO ASI mini  w/80mm piggyback refractor
Exposure:  120m
Location:  Payson, Arizona, Elevation:  5150 ft.
Sky:  Seeing FWHM = 2 arcsec , Transparency 9/10
Outside Temperature:  55 F

Image Processing Tools: 
Maxim DL6:  Calibration, Color Conversion, aligning, stacking
PixInsight:  Saturation Curves
Photoshop CS2:  Curves, Color Correction, Gradient removal (Grad Xterminator), Cleanup

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