Sunday, May 26, 2019   
Astrophotography Gallery > Star Clusters > Globular Cluster M4
Date: Friday, May 10, 2013
Location: Lemoore, CA
Messier 4, also catalogued as NGC 6121, is a beautiful globular cluster located in the constellation Scorpius. It is very easy to find with a telescope, as it lies just over a degree away from Antares, the brightest star in Scorpius. Unlike many other globular clusters, the core is not quite as dense and, thus, in a telescope, may first appear to be an open cluster. It is estimated to be approximately 7,200 light years away, thus making it one of the two closest globular clusters to Earth.
Mount: Celestron CGEM
Camera: Canon 60D (Stock)
Scope/Lens: Orion Astrograph 8" f/3.9 Newtonian
Guide Scope: Orion ST 80mm f/5 Refractor
Guide Camera: Orion Starshoot Autoguider
Exposure #1 (RGB):
   54 x 35 Seconds @ ISO 800, f/3.9
   15 Darks, 0 Flats/Dark Flats/Bias

Integration: 0 Hours, 31 Minutes, 30 Seconds
Processing: BackyardEOS, PHD, DeepSkyStacker, Adobe Photoshop CS6
(Click Image to View Original Full Size)
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