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Messier 6
Messier 6 Butterfly Cluster
Credit: NASA, ESA

M6 (NGC 6405) - Butterfly Cluster

Messier 6 (NGC 6405), also known as the Butterfly Cluster, is an open cluster located in the constellation Scorpius, in the Orion Arm of the Milky Way Galaxy in the Local Group of galaxies. M6 is 1,600 light years away from Earth.

M6 is best viewed during mid-summer, is magnitude 4.2, and can be viewed with naked eye. M6 is 25' in apparent size. For reference, the full moon is 30' (arc minutes) in size.

      1. Name:
      2. Butterfly Cluster
      1. Type:
      2. open cluster
      1. NGC or IC:
      2. NGC 6405
      1. Magnitude:
      2. 4.2
      1. Viewing:
      2. naked eye
      1. Size:
      2. 25'
      1. Distance (light years):
      2. 1,600 LY
      1. RA:
      2. 17h 40.1m
      1. Dec:
      2. -32 13'
      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.