Globular Cluster in Libra

Uploaded 5/31/02

This 8.4 magnitude object is one of the few interesting objects in Libra, being a small constellation near the zone of avoidance for galaxies, it is nearly barren. 11 arcmins in size, the typical magnitude of 13 - 16. Visually, this object is a low surface brightness object like M55, and few stars can be resolved in the eyepiece. The typical orange and blue stars are apparent, a background haze of blue giant stars mixed in with orange super giants.

Instrument:  12.5" f/5 Home made Newtonian
Platform:  Astrophysics 1200 QMD
CCD Camera:  SBIG ST7E w/Enhanced Cooling
Exposure:  LRGB = 60:20:20:20 (RGB Binned 2x2)
RGB Combine Ratio:  1: .95: 1.8
Filters:  RGB Tricolor
Location:  Payson, Arizona
Elevation:  5150 ft.
Sky:  Seeing FMHW = 3.5 arcsec, Transparency 8/10
Outside Temperature:  20 C
CCD Temperature:  -15 C
Processing:  Maxim DL, Photoshop, AIP4WIN, PW Pro.




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