M13 untracked (lowenthalm)

Celestial hemisphere: Northern · Constellation: Hercules (Her) · Contains: Great Cluster in Hercules · Hercules globular cluster · IC 4617 · M 13 · NGC 6205

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M13 untracked

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M13 untracked

Here is a pretty pic I snapped using my ASI294 stuck on my Orion Spaceprobe 130ST last night before the clouds came in. I have been thinking about getting the sidereal tracking motor for this scope for impromptu EAA and I think this pic has convinced me its worth getting.

The actual exposure is 0.25s x 1081 frames. With the quarter second exposures, I placed the target to one side of the center of the field of view and just allowed the target to drift across to the opposite side of the field of view and then paused live-stacking in SharpCap while I dragged M13 back to the where its original position in the field of view and then resumed stacking. I repeated this process for several minutes (maybe five or six times?). The result was a roughly square image area with decently crisp and round star images without a hint of star trailing.

I stretched and color corrected (by neutralizing the sky color) the 16-bit raw image data saved from SharpCap using GIMP 2. I applied no sharpening, since it didn't seem to need it.

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Globular Clusters

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Status	Advanced success
Started	...
Astrometry.net job	2085384
PixInsight job	27M8YA0HNLG30CRJK14VJUUBQ72MRTDW
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	16h41m41s.100
RA (top/left)	16h40m21s.83
RA (top/right)	16h42m55s.88
RA (bottom/right)	16h43m02s.51
RA (bottom/left)	16h40m27s.52

Dec (center)	+36°28′06″.3
Dec (top/left)	+36°14′44″.10
Dec (top/right)	+36°13′22″.10
Dec (bottom/right)	+36°41′22″.2
Dec (bottom/left)	+36°42′45″.5

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M13 untracked

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