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: Apertura CarbonStar 200 Imaging Newtonian 800mm / F4
Camera: ZWO ASI2600 MC Pro – No Filter
Mount: Celestron AVX – With CPWI Software
Guiding: Apertura 32mm Guide Scope with a ZWO ASI120MM Camera and PHD2
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, Oplong L-Quad filter
White Bal (B) = 66
White Bal (R )= 99
Brightness = 12
Camera Temperature = -4
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
