M72 - Globular Cluster in Aquarius

 
 
 
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  • RA: 20:53.5
  • Dec: -12:32
  • Magnitude: 9.3
  • Distance: 55,400 ly
  • Size:  6.6 arc min
  • Constellation:  Aquarius
  • Scope: 8" SCT at f/10
  • Autoguider:  ST-4 in average mode
  • Sky conditions:  above average transparency and seeing
  • Camera: Hutech modified Canon 300D
  • Exposure:  10 x 2 minutes ISO800
  • Date:  September 26, 2008
 
 
Comments:  A very pleasant night for September with a low in the lower 50s. M72 is one of the more remote of Messier's globular clusters. It is approaching us quite rapidly, at 255 km/sec, and has the considerable number of 42 known variables, most RR Lyrae stars. Its diameter is about 106 light years.