Messier 13 Globular Cluster in Hercules (Harri Heikkinen)

Celestial hemisphere: Northern · Constellation: Hercules (Her) · Contains: Great Cluster in Hercules · M 13 · NGC 6205 · NGC 6207

Messier 13 Globular Cluster in Hercules, Harri Heikkinen

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Messier 13 Globular Cluster in Hercules

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Messier 13 Globular Cluster in Hercules

Testing autoguiding Az-Gti mount in EQ mode with 500mm f8.0 Maksutov-Cassegrain MTO MC-3M 5CA in heavily light polluted backyard. This will be my new travel setup, well under 10kg with everything included.

Hercules cluster would benefit from longer focal length but it was bright enough for f/8 lens in full moon and conveniently clearing past neighbor's tree so thought why not try a wide field.. Turned out better than expected.

Polar aligning this mount is a challenge as there is no polar scope, luckily Sharpcap's very handy polar align feature came to the rescue. PHD2 guiding graph was all over the place but surprisingly most of the subs were keepers - apart from the ones discarded due to passing thin clouds.

Canon 1100d ISO 1600 (unmodified) and Altair GPCAM2 224c with 50mm FL C-mount lens as guidescope. Lights 27x120" + 38x60". Calibration: 40 flats, 20 darks, 20 dark flats, 20 bias.

"Nordish by nature"
Beginners AP
Suburban Astrophotography
Imaged with APT

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Astrometry.net job	3247522
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Messier 13 Globular Cluster in Hercules

Messier 13 Globular Cluster in Hercules

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Messier 13 Globular Cluster in Hercules

Messier 13 Globular Cluster in Hercules

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