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Original file size733 KB
Image typeJPEG
Color spaceUncalibrated
M13 - Globular Cluster in Hercules

M13 - Globular Cluster in Hercules

Date: 5/27/2011
Target: M13 - Globular Cluster in Hercules
Telescope:
Orion 8" f/4.9
Multi-Purpose Coma Corrector
JMI EV-1n Focuser
Resurfaced: Spectrum Coatings Max "R" (EAL)
Camera: SBIG ST-8300M
Exposures 3 min each (R:G:B): 60:60:39
Framing: North is Up
Location: Mocksville, NC
Seeing: 4/5
Transparency: 3/5
Start Time: 10:00PM
End Time: 2:00AM
Captured with Nebulosity, stacked using DeepSkyStacker, processed in Photoshop.


From Wikipedia:
Messier 13 or M13 (also designated NGC 6205 and sometimes called the Great Globular Cluster in Hercules or the Hercules Globular Cluster) is a globular cluster of about 300,000 stars in the constellation of Hercules.

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.