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The Details
Object
M 92 Globular Cluster in Hercules
Optics
Astro-Physics 160 EDF Refractor at f/7.7
Platform
Astro-Physics 1200 GTO
Camera
SBIG ST-10XME
Filters
Tru-Balance LRGB filter set - Generation 2
Date
27 June 2011
Location
Mount Wilson Observatory, Mount Wilson CA
Exposure
L 9 x 300 sec 1x1 bin; RGB 5 ea x 300 sec 1x1 bin; L(core) 20 ea x 120 sec 1x1 bin
Software
Maxim DL/CCD, , CCDStack 2, Photoshop CS5
Orientation
Field of view: 32' x 23'" centered on RA 17h17m05s
DEC +43°17'12". North angle 87°; east 90° CCW from north
Notes

M92 in the constellation Hercules is a magnificent globular cluster lying about 26,700 light years from Earth.  Spectacular in its own right, it is often overlooked as its nearby neighbor, M13, eclipses it in size and sheer volume of stars.  M92 has an approximate diameter of about 110 light years and is approaching us at about 112 km/sec.  Due to the phenomenon of precession, this cluster will be within 1° of the north celestial pole in about 14,000 year’s time.  Imagine polar aligning your scope in the far future by using a globular cluster as a reference object instead of a star like today’s Polaris!

 

 

 

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