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Messier Objects

Messier M101 - Pinwheel Galaxy

M101 (NGC 5457), also known as Pinwheel Galaxy, is a spiral galaxy located within the constellation Ursa Major in the M101 Group of galaxies.

M101 is best viewed during early spring, is magnitude 8.5*, and can be viewed with binoculars. It is 22' in size. For reference, the full moon is 30' (arc minutes) in size.

      1. Name:
      2. Pinwheel Galaxy
      1. Type:
      2. spiral galaxy
      1. NGC:
      2. 5457
      1. Magnitude (m):
      2. 8.5
      1. Viewing:
      2. binoculars
      1. Size:
      2. 22'
      1. RA:
      2. 14h 3.3m
      1. Dec:
      2. 54 22'
      1. Season:
      2. early spring
      1. Galaxy group:
      2. M101 Group

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



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