M18 (NGC 6613)
Messier M18 (NGC 6613) is a open cluster located in the constellation Sagittarius, in the Sagittarius Arm of the Milky Way Galaxy. in the Local Group of galaxies.
Messier M18 is best viewed during late summer, is magnitude 8.0*, and can be viewed with binoculars. It is 9' in size. For reference, the full moon is 30' (arc minutes) in size.
* The naked eye can see up to magnitude 8 objects under ideal dark sky conditions.
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