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Messier Objects

Messier M100

M100 (NGC 4321) is a spiral galaxy located within the constellation Coma Berenices in the Virgo Cluster of galaxies.

M100 is best viewed during late spring, is magnitude 10.5*, and can be viewed with small telescope. It is 7 x 6' in size. For reference, the full moon is 30' (arc minutes) in size.

      1. Name:
      1. Type:
      2. spiral galaxy
      1. NGC:
      2. 4321
      1. Magnitude (m):
      2. 10.5
      1. Viewing:
      2. small telescope
      1. Size:
      2. 7 x 6'
      1. RA:
      2. 12h 23.0m
      1. Dec:
      2. 15 50'
      1. Season:
      2. late spring
      1. Galaxy group:
      2. Virgo Cluster

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



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