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Classification: Globular cluster; M3 / NGC5272 ,(Vl) A spherical collection of stars that orbits a galactic core as a satellite.
Constellation: Canes Venatici (CVN)
Object Location: Ra 13h 42m 51s Dec +28° 18’23° (current)
Size & Distance: 18.0 x 18.0 Apx 33.9 light-years.

Date & Location: 5-18-2007 Palomar Mountain, CA
Exposure: LRGB L= 11 @ 5min. RGB 3ea. @ 5min. (bin 1x1)
Optics: Takahashi Epsilon 180 f/2.8 504mm
Mount: Astro-Physics 900 GTO / ATS 10x36 Pier
Camera: Starlight-Xpress SXV-H9, SXV Guider Head. Guide scope Meade 2045
Filters: Astrodon Gen1 LRGB
Software: MaxImDL 4.11, Photoshop 6

Notes: Sky conditions: Very good seeing, No wind, Temp 56°
Image Field of view is 68 x 101 arcmin.

Messier 3 (also known as M3 or NGC 5272) is a globular cluster of stars in the
northern constellation of Canes Venatici. It was discovered by Charles Messier
on May 3, 1764, and resolved into stars by William Herschel around 1784. Since
then, it has become one of the best-studied globular clusters.