The "Other" Globular Cluster in Hercules

Uploaded 6/12/2001

The constellation of Hercules contains two of the brightest globular clusters in the sky, M13 and M92. The latter is often overlooked because it is smaller and fainter than its big brother, however, M92 has a startling contrast of colors and core intensity that sets it apart from its brethren. Rated at 6.5 magnitude, and 14 minutes in size, this class 4 globular cluster is part of the outer halo of our Milky Way Galaxy. The brightest cluster members here are 12th magnitude, and are orange super giants, contrasting greatly with the inner blue core of blue giant stars. This is the first dark of the moon image with my new AP1200 mount.

Instrument:  12.5" f/5 Home made Newtonian
CCD Camera:  SBIG ST7E w/Enhanced Cooling
Exposure:  LRGB = 45:10:10:20 
Filters:  RGB Tricolor
Location:  Payson, Arizona
Elevation:  5150 ft.
Sky:  Seeing 8/10, Transparency 5/10
Outside Temperature:  70 F
CCD Temperature:  -20 C
Processing:  Maxim DL, Photoshop, PW Pro.

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