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Star Cluster

Messier 9 :
globular star cluster

Messier 9 is a globular star cluster located in the constellation Ophiuchus . Messier 9 is magnitude 7.72*, and is 12' in size. For reference, the full moon is 30' (arc minutes) or 0.5° in size.

      1. Name:
      2. Messier 9
      1. Type:
      2. globular cluster
      1. Magnitude (m):
      2. 7.72
      1. Size:
      2. 12'
      1. Right Ascension:
      2. 17h 19m 11.53s
      1. Declination:
      2. -18° 30' 58.2"
      1. Messier #:
      2. M9

    * One can see up to magnitude 7-8 objects with perfect eyes under ideal dark sky conditions.



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