M3 Globular Cluster in Canes Venatici
Uploaded 5/13/16

 
The
            seeing on this night was poor, however this image hints at the
            potential of using the 10 inch for globular clusters. Here is
            my first shot of a globular with the new 10 inch, and the stars
            are sharp to the corners, and colors rich - the blue and golden
            stars are well differentiated.

            
Select an image size for a larger view:

1290 x 960


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: Meade DSI Pro  w/80mm piggyback refractor
Exposure:  RGB = 60m total
AstroDon RGB Combine Ratio:  1: 1.05: 1.2
Location:  Payson, Arizona, Elevation:  5150 ft.
Sky:  Seeing FWHM = 5 arcsec , Transparency 6/10
Outside Temperature:  45 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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