M13 the Great GC Imaged by an 80mm APO at 385mm Focal Length (Steve Argereow)

Celestial hemisphere: Northern · Constellation: Hercules (Her) · Contains: HD150119 · HD150293 · HD150462 · HD150510 · HD150566 · HD150679 · HD150998 · HD151428 · Hercules Globular Cluster · IC 4614 · IC 4615 · IC 4616 · IC 4617 · M 13 · NGC 6196 · NGC 6197 · NGC 6205 · NGC 6207

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M13 the Great GC Imaged by an 80mm APO at 385mm Focal Length

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M13 the Great GC Imaged by an 80mm APO at 385mm Focal Length

M13 - Great Hercules Globular Cluster

M13 is a spectacular globular cluster and the best example of its type in the northern section of sky. It's the standout deep sky object in the constellation of Hercules and is sometimes referred to as the Great Hercules Globular Cluster. At Mag. +5.8, it's just about visible to the naked eye and an easy binocular target. The popularity of M13 is mainly due to its declination; it lies at 36N and from northern temperate latitudes is well placed high in the sky during summer months. There are many other globular's larger and brighter than M13, but all are located in the southern section of the sky. As a result, they either never rise or appear low down from most North America, European and Asian locations. Hence, M13 is perhaps the most observed and studied globular cluster of all.

M13 was discovered by the Astronomer Royal, Sir Edmond Halley in 1714. He described it as "a little patch, but shews itself to the naked eye, when the sky is serene and the Moon is absent". Fifty years later, Charles Messier catalogued it on June 1, 1764. The globular is located 25,100 light-years from Earth. It has a spatial diameter of 145 light-years and is estimated to contain about 300,000 stars.

Information Credits: FreeStarCharts.com

Telescope: Meade 80mm APO Refractor X.8 Reducer 385mm Fl
Mount IOptron CEM40
Camera ZWO6200MC
ZWO EFW

56 X 210 Second Exposures W/Optolong L-Pro Filter Gain 100 Offset 50
20 Dark Frames 80 Flats
Total Integration Time: 3 Hours 16 Minutes
Acquisition with SharpCap
Astro Pixel Processor
Guiding with PHD2
Processed with Astra Image/GIMP

Photo taken from Seven Lakes, NC Bortle 4.5

ZWO ASI 2600MC PRO
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Status	Advanced success
Started	...
Astrometry.net job	5915557
PixInsight job	FGRABC6Y97YQ5FU3JG9SE38RIBD9KUL5
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	16h41m35s.76
RA (top/left)	16h45m50s.84
RA (top/right)	16h45m35s.21
RA (bottom/right)	16h37m13s.71
RA (bottom/left)	16h37m43s.72

Dec (center)	+36°27′50″.3
Dec (top/left)	+35°20′56″.10
Dec (top/right)	+37°37′26″.8
Dec (bottom/right)	+37°34′04″.6
Dec (bottom/left)	+35°17′35″.9

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M13 the Great GC Imaged by an 80mm APO at 385mm Focal Length

M13 the Great GC Imaged by an 80mm APO at 385mm Focal Length

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M13 the Great GC Imaged by an 80mm APO at 385mm Focal Length

M13 the Great GC Imaged by an 80mm APO at 385mm Focal Length

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