M13 (Jonny Bravo)

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

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M13

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M13

Goofi's imaging challenge for June, 2022.

I imaged M13 last year with my 0.8x reduced GT81. This year, I decided to try it using my 8" EdgeHD natively at f/10. I've been struggling with the new setup. Funky artifacts on bright stars, chromatic aberration, tilt, tracking problems, etc. I have gotten the system to a semi-decent place now, but I still have some concerns with it.

Tilt I've mostly eliminated. Spacing is pretty good. I still get the bizarre artifacts on bright stars - almost looks like pinched optics. Chromatic aberration is much less pronounced without the 0.7x reducer in the imaging train. RA guiding error is still typically twice that of Dec guiding error, so my stars are still elongated a bit.

I'm pretty happy with the result of this data, all things considered.

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This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
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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.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
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Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	5918641
PixInsight job	ZGWOCRO01SELOBYSW2PYJJKTD4D1PQJT
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	16h41m39s.484
RA (top/left)	16h42m58s.438
RA (top/right)	16h40m21s.197
RA (bottom/right)	16h40m20s.910
RA (bottom/left)	16h42m57s.293

Dec (center)	+36°27′39″.11
Dec (top/left)	+36°38′15″.92
Dec (top/right)	+36°38′28″.23
Dec (bottom/right)	+36°16′59″.99
Dec (bottom/left)	+36°16′48″.52

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