Celestial hemisphere:  Northern  ·  Constellation: Hercules (Her)  ·  Contains:  Hercules Globular Cluster  ·  IC 4617  ·  M 13  ·  NGC 6205
M13 - The Great Hercules Cluster, Gianluca Beccani
M13 - The Great Hercules Cluster
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M13 - The Great Hercules Cluster

M13 - The Great Hercules Cluster, Gianluca Beccani
M13 - The Great Hercules Cluster
Powered byPixInsight

M13 - The Great Hercules Cluster

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Description

This is a test image to better understand my new Starizona SCT reducer/corrector Mark III; although I was still too short in backfocus distance, resolution was great due to nice seeing condition and good collimation: a small crop did the magic and made me be pretty satisfied by the whole image. I let my C9.25 (reduced at f/6.3) run guided by PHD2, even if subframes were pretty short (30"); also tried adding a luminance channel but the result was worse than doing a simple RGB combination. M13 is the biggest globular cluster in the northern emisphere and a little more post-processing must be done in order to get the core resolved and not burnt.

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M13 - The Great Hercules Cluster, Gianluca Beccani