By Hassan Dadashi . arani | 2022-04-20
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On 04/20/2022 11:30 pm by David Hoskin| Halifax, Nova Scotia, Canada
Messier 13, also known as the Hercules Globular Cluster, is a large globular star cluster in the constellation Hercules. Messier 13 is 145 light years across and contains about 300,000 stars. It is 22,200 light years from Earth.
Celestron 150mm XLT f/5 reflector, ZWO ASI533MC Pro camera with Optolong L-Pro filter, SkyWatcher EQ6R Pro mount.
26 4-minute lights plus calibration frames were stacked using ImagesPlus; other post-processing used Photoshop CS2 plus Astronomy Tools plugin, Siril, and PhotoScape X
