Hercules Cluster (M13)
Every known regular galaxy has been found to contain several hundred of these mysterious dense collections of stars, known as globular clusters. Our Milky Way contains approximately 150 such clusters, the origins of which are poorly understood. They exist in the halo region of a galaxy - the half-spherical areas above and below the galactic plane - and are ancient relics from the formation of the galaxy. Many clusters exhibit bi-modal populations of stars including the Hercules cluster, which displays both red-yellow and blue-white stars numbering in the hundreds of thousands. Some clusters contain several million stars.
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Imaging telescope or lens: Stellarvue SV105 APO
Imaging camera: QSI 683 wsg-8
Mount: Orion Atlas EQ-G (belt mod) + EQDIR
Guiding camera: Starlight Xpress Loadestar 2
Software: Main Sequence Software Seqence Generator Pro, Deep Sky Stacker (DSS), Photoshop CC, PhD Guiding 2
Filters: Baader Planetarium L 1.25", Baader Planetarium B 1.25", Baader Planetarium G 1.25", Baader Planetarium R 1.25"
Resolution: 6350x4705
Dates: June 1, 2016
Frames:
Baader Planetarium B 1.25": 10x120" -20C bin 1x1
Baader Planetarium G 1.25": 10x120" -20C bin 1x1
Baader Planetarium L 1.25": 77x120" -20C bin 1x1
Baader Planetarium R 1.25": 10x120" -20C bin 1x1
Integration: 3.6 hours
Flats: ~50
Bias: ~100
Bortle Dark-Sky Scale: 5.00
Astrometry.net job: 1117357
RA center: 250.416 degrees
DEC center: 36.459 degrees
Sky Map