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Messier Catalog M7

M7 (NGC 6475) - Ptolemy Cluster

Messier M7 (NGC 6475), also known as the Ptolemy Cluster, is a open cluster located in the constellation Scorpius, in the Orion Arm of the Milky Way Galaxy. in the Local Group of galaxies.

Messier M7 is best viewed during mid-summer, is magnitude 3.3*, and can be viewed with naked eye. It is 80' in size. For reference, the full moon is 30' (arc minutes) in size.

      1. Name:
      2. Ptolemy Cluster
      1. Type:
      2. open cluster
      1. NGC:
      2. 6475
      1. Magnitude (m):
      2. 3.3
      1. Viewing:
      2. naked eye
      1. Size:
      2. 80'
      1. RA:
      2. 17h 53.9m
      1. Dec:
      2. -34 49'
      1. Season:
      2. mid-summer
      1. Milky Way location:
      2. Orion Arm
      1. Galaxy group:
      2. Local Group

    * The naked eye can see up to magnitude 8 objects under ideal dark sky conditions.



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