Globular Cluster M13 in Hercules
M13 (also designated as NGC 6205) is the most famous globular cluster of the northen sky. M13 was discovered by Edmond Halley in 1714, and catalogued by Charles Messier on June 1, 1764.
Visible with naked eye in good weather condition. M13 is about 145 light-years in diameter, and it is composed of several hundred thousand stars, the brightest of which is the variable star V11 with an apparent magnitude of 11.95. M13 is 25,100 light-years away from Earth.
To see another picture of M13 please click here M13 taken with ST8300 and FSQ
Photo Details
Telescope: Orion CT8 Newton(900mm)
Camera: Sbig STL11000, Filter wheel, Baader 2" LRGB filters
Mount: Takahashi NJP
Guiding: Self-guided
Exposure: LRGB L 5x8min, RGB 2x8min
When: April 2017
Other information: good transparency, good seeing, Tylmanowa 
Photo Details
Telescope: Celestron C8N (1000mm)
Camera: Sbig ST-2000XM, Filter wheel, Baader 1.25" LRGB filtes
Mount: NJP Takahashi
Guiding: Self-guided
Exposure: LRGB L 13x480sec, RGB 5x480sec
When: ----
Other information: good transparency, good seeing 
Photo Details
Telescope: Celestron C8N (1000mm)
Camera: Sbig ST-2000XM, Filter wheel, Baader 1.25" LRGB filtes
Mount: NJP Takahashi
Guiding: Self-guided
Exposure: LRGB 3h
When: ----
Other information: good transparency, good seeing, taken from city of Tarnow