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One of the most spectacular
            globular (pronounced "globe-u-lar") clusters in the
            sky is M5 in the constellation of the Serpent. This object visually
            is only slightly less impressive than the brighter M13, andt
            has a few surprises. One is that two of its variables reach a
            brightness of at least 10th magnitude - a star designated as
            42 and 84 in Coutts and Hogg's list. While most of the stars
            have magnitudes between 11 and 12, the integrated magnitude is
            5.7 of all stars combined. The size of 22 arcmins puts it much
            larger than my 30 arcmin field. This objects color is a prime
            example of globular cluster stellar distributions. The main core
            is composed of blue super giants, surrounded by a periphery of
            orange super giant stars, both seen well in this image.
Instrument:  12.5" f/5 Home made Newtonian
Mount:  Astrophysics 1200 QMD
CCD Camera:  SBIG 10XME NABG with Enhanced Water Cooling
Guider: Meade DSI  w/Lumicon Newt Easy Guider
Exposure:  RGB = 20:20:20 
AstroDon RGB Combine Ratio:  1: 1.05: 1.4
Location:  Payson, Arizona, Elevation:  5150 ft.
Sky:  Seeing FWHM = 5 arcsec (Maxim DL - 10min subframe), Transparency 8/10
Outside Temperature:  45 F
CCD Temperature:  -30 C
Image Processing Tools: 
Maxim DL:  Calibration, deblooming (Starizona Debloomer), aligning, stacking
PixInsight:  Curves, Deconvolution, noise reduction
Photoshop CS2:  Curves, Color Correction, Gradient removal (Grad Xterminator), Cleanup

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