M13 – The Great Hercules Cluster | Craig & Tammy Temple

Craig & Tammy Temple
Location of photo
Hendersonville, TN, USA
Date/Time of photo
May 24, 25 & 26, 2012
Telescope: Stellarvue Raptor SVR105 @ f/7 Accessories: Stellarvue SFF7-21 flattener; Dew control by Dew Buster; Alnitak Flat-Man Mount: Takahashi EM-200 Temma2 Camera: QSI583wsg CCD @ -10.0C Guiding: Starlight Xpress Lodestar via PHD Filters: Astrodon Tru-balance E-Series Generation II LRGB Exposure: 33 x 6min.(L); 12 x 6min.(R); 15 x 6min.(G); 16 x 6min.(B); all binned 1x1 Acquisition: ImagesPlus Camera Control v4.3 Processing: Calibration, DDP in Images Plus v4.5; Registration in Registar & ImagesPlus Post-processing: ImagesPlus 4.5; Adobe Photoshop CS5
M13 (NGC 6205), the Great Hercules Cluster, is a globular cluster of approximately 300,000 stars that lies around 25,000 light-years away in the constellation Hercules and has an apparent magnitude of 7. This cluster is about 145 light-years in diameter. Edmond Halley discovered M13 in 1714 but it was not catalogued by Charles Messier until June 1, 1764. The galaxy that lies to the upper right of the cluster in this image is a 12th magnitude edge-on galaxy, designated NGC 6207, and halfway between NGC 6207 and M13 is the small galaxy IC4617.
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