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M13 / Hercules Globular Cluster

Classification: Globular cluster; M13 / NGC6205 ,(V) A spherical collection of stars that orbits a galactic core as a satellite.
Constellation: Hercules (HER)
Object Location: Ra 16h 42m 13s Dec +36° 26’2
Size & Distance: 20.0 x 20.0 Apx 22.2 light-years.

Date & Location: 3-27-2009 Little Blair Valley, CA
Exposure: LRGB L=10 @ 2min. RGB 6ea. @ 5min. (bin 1x1)
Optics: Telescope Engineering Company APO140ED f/7 980mm
Mount: Astro-Physics 900 GTO / ATS 10x36 Pier
Camera: SBIG-ST10XME @-15c
Filters: Astrodon Gen2 LRGB
Software: MaxImDL 5.45, Photoshop CS

Notes: Sky conditions: Good seeing, No wind, Temp 27°
Image Field of view is 35 x 52 arcmin.

Messier 13 (M13), / NGC 6205 and sometimes called the Great Globular Cluster in Hercules or the Hercules Globular Cluster, is aglobular cluster of about 300,000 stars.

M13 was discovered by Edmond Halley in 1714, and catalogued by Charles Messier on June 1, 1764.