M13 - The Great Hercules Cluster (DanielZoliro)

Celestial hemisphere: Northern · Constellation: Hercules (Her) · Contains: Hercules Globular Cluster · IC 4617 · M 13 · NGC 6205

M13 - The Great Hercules Cluster

My first globular cluster image! Never had much of an interest in imaging star clusters. Can you blame me when there's so many awesome nebulae and galaxies out there? But I gave this one a shot, and I'm really happy with how it turned out. Maybe I should give those star clusters a little more attention.

I used my Hyperstar setup with my ASI533mc Pro to image this. I deviated from my typical camera settings this time, knowing that I was only going to be targeting stars. I lowered the gain to 70 for better dynamic range, and only did 10 second exposures vs my typical 20 second exposures with the Hyperstar. I ended up taking 800 exposures, of which I only used 211 exposures. I was super picky about keeping subs, because I really wanted the stars to be as perfect as possible, since the stars were the spotlight. These are the best stars I've ever imaged with the Hyperstar, so I might consider trying these settings next time I image a nebula or galaxy. This gave me a total integration time of about 35 minutes which doesn't seem like very much. But if I were to try to achieve the same result with my f5.6 refractor including a reducer, I would have needed approximately 3 hours of useable data.

Most of my workflow in Pixinsight was the same as my other OSC images. Like usual, I extracted a luminance to be processed separately from the RGB, and then recombined them later with the LRGB combination process. I would say that the only major difference was with Deconvolution. I found that I needed to go really easy on the Deconvolution to get the best results.

Let me know what you think...I'm open to any criticism or tips that might help me for the next time I image a star cluster.

Hope you enjoy it and Clear Skies!

Daniel

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Status	Advanced success
Started	...
Astrometry.net job	4506698
PixInsight job	4ABBFLKEBSWCZGGTU0N1RYCRTF7RL0UU
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	16h41m38s.946
RA (top/left)	16h40m58s.455
RA (top/right)	16h43m38s.879
RA (bottom/right)	16h42m19s.903
RA (bottom/left)	16h39m38s.901

Dec (center)	+36°27′34″.12
Dec (top/left)	+36°04′40″.52
Dec (top/right)	+36°24′32″.73
Dec (bottom/right)	+36°50′27″.72
Dec (bottom/left)	+36°30′28″.37

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