The Hercules Cluster (M13)

Posted by kostas_75
on Monday, May 29, 2017

M13 is generally considered the finest globular cluster in the northern skies, mainly because it is visible to the naked eye in a well-known grouping of stars that sails high overhead in the summer sky. It is a swollen mass teeming with perhaps 300.000 to a half-million suns spread across 140 light years or more.

Technical Details

Optics: Vixen VC200L @ f/6.4
Mount: HEQ5 synscan Pro
Guiding: ST-237 guide chip of SBIG ST2000XM
Camera: SBIG ST2000XM
Filter Wheel: SBIG CFW9
Filters: Astronomik LRGB
CCD Temperature: -5 degrees Celsius
Constellation: Hercules
Date: 20 May, 2017
Location: Kifisia, Greece
Exposure
Lum : 60 min (60x1 min)
Red : 30 min (30x1 min)
Green : 30 min (30x1 min)
Blue : 30 min (30x1 min)
Binning: 1x1(L,R,G,B)

Total exposure 2.3 h

Calibration: Darks, Flats, Bias
Software: SkyX, Pixinsight

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