The Great Globular Cluster in Hercules is a globular cluster of several hundred thousand stars in the constellation of Hercules. Messer 13 was discovered by Edmond Halley in 1714, and cataloged by Charles Messier in 1764, into his list of objects not to mistake for comets. It is located at right ascension 16h 41.7m, declination +36° 28′. Messier 13 is often described by astronomers as the most magnificent globular cluster visible to northern observers.
Object Designations: Messier 13, M13 and NGC6205
Also known as: Great Globular Cluster in Hercules, Hercules Globular Cluster, or the Great Hercules Cluster
Constellation: Hercules
Object Type: globular cluster
Distance: 24,000 light-years away
Magnitude: 5.8
Discovery: Edmond Halley
Telescope: Celestron 9.25 SCT 2350 mm / f10 with Starzona .63 Corrector 1525 mm / F7
Camera: ZWO ASI2600 MC Pro – Luminance Filter
Mount: Celestron CGEMII – With CPWI Software
Guiding: Celestron StarSense Autoguider
SharpCap Imaging Software
Processing Software
AstroSharp Ltd SharpCap
Pleiades Astrophoto PixInsight
Russell Croman Astrophotography BlurXTerminator
Russell Croman Astrophotography NoiseXTerminator
Russell Croman Astrophotography StarXTerminator
Stanley Dimant EZ Processing Suite
This final image is:
43 – 60 second subs at 0 gain, Luminance Filter
White Bal (B) = 60
White Bal (R )= 60
Brightness = 12
Camera Temperature = -10
Last Plate Solve Data = Plate solve result was RA=16:42:55.4,Dec=+36:28:56 with mount at RA=16:42:55.6,Dec=+36:28:56, FOV 1.556×1.040 degrees, up is 234.90 degrees East of North
