M13 - The Hercules Cluster
Location :
Optics :
Filter(s) :
Mount :
Optics :
Filter(s) :
Mount :
Landgraaf
Orion Optics UK 10" f4.8 Newton + Paracorr
IDAS LPS-P2
Losmandy G-11
Autoguiding :
Camera :
Exposure info :
Total Exposure :
Camera :
Exposure info :
Total Exposure :
Atik 1HS, 60/700 Achro & PHD Guiding
SBIG ST-8300M
21 x 180 sec
1h 3m
SBIG ST-8300M
21 x 180 sec
1h 3m
[ Other resolutions/versions - or click the image for maximum resolution available ]
Maximum Resolution 2000 x 1500 Pixel (237 kB)
Additional notes and remarks:
Object info
M13, also known as the 'Great Hercules globular cluster', is one of the most prominent and best known globular clusters of the Northern sky. With an apparent magnitude of 5.8, it is just visible with the naked eye under good conditions. Its diameter is about 145 light-years, and it is composed of several hundred thousand stars. M13 is 25,100 light-years away from Earth.
Processing
All separate frames were calibrated, aligned and stacked in ImagesPlus 2.8.
Photoshop CS2 was used for further processing - curves adjustment, levels adjustment, etc. The image was calibrated using 10 darks, 15 (dark-subtracted) min/max excl. average combined flats and bias frames.
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