M13 Hercules Globular Star Cluster

Globular star cluster M13, and galaxies NGC6207 and IC4617.  Click the picture for a larger view.
Globular star cluster M13, and galaxies NGC6207 and IC4617. Click the picture for a larger view.

I treated this as a high dynamic range object, alternating 10 minute and 15 minute exposures, but started a little late in the evening, and had a couple of throw-away shots, so only got 5 at each duration.  Still, I not only got more definition than ever in NGC 6207, the galaxy towards the top right corner of the frame, but also a galaxy I didn’t even know about.  IC 4617 is just less than halfway from the top edge of M13 to NGC 6207.

Shot with the 127 mm Apochromatic Refractor (f/7.5, 952 mm Focal length) at ISO 1600.

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