One of the dimmest Globular clusters in the entire sky, this large 7.4 arcminute object in Serpens is rated at 12th magnitude, but is spread out over a large area here. Most of the stars in this cluster are around 16th magnitude, the brightest being 15.5 per the literature. It is not as red as many globulars, with a B-V of only 1.1. The blazing star to the lower left - 9.8 magnitude was quite overexposed in this deep image. The field contains a plethora of dim galaxies. The most prominent, towards 5 o'clock near the bottom is Mac 1515-0010B, a 16th magnitude Elliptical. A small inclined spiral, yellowish in color is directly below the cluster, and the left side of the field has several more. Interesting note, the bright star to the upper right is classed as a "Non Star" in the Hubble Guide star catalog!

Instrument:  12.5" f/5 Home made Newtonian
Platform:  Astrophysics 1200 QMD
CCD Camera:  SBIG ST7E w/Enhanced Cooling
Exposure:  LRGB = 60:10:10:10 (RGB Binned 2x2)
RGB Combine Ratio:  1: .95: 1.8
Filters:  RGB Tricolor
Location:  Payson, Arizona
Elevation:  5150 ft.
Sky:  Seeing FMHW = 2.5 arcsec, Transparency 8/10
Outside Temperature:  15 C
CCD Temperature:  -20 C
Processing:  Maxim DL, Photoshop, AIP4WIN, PW Pro.

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