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M13 (NGC 6205)

Great Globular Cluster in Hercules

Typ:Starcluster
Constellation:Hercules
Size:16.6'
Distance:22.2 kLj
Brightness:5.8 mag
Position:RA:16h 41m 41.24s DEC:+36° 27′ 35.5″
Max. height:76.46°, Jun. (midnight at +50°N)
Show in Stellarium
Discovered:Edmond Halley, 1714
Details:Read more on Wikipedia

M13 was first observed in 1714 by Sir Edmond Halley and included into Charles Messier's catalog after his own observation in 1764.

It is rather easy observable using binoculars and with some experience and ideal conditions may be observed with naked eyes.

The next image shows the full frame in a manual edit (580mm, ASI2600MM, LRGB 1h).