M13 - The Great Globular Cluster in Hercules (Uwe Deutermann)

M13 - The Great Globular Cluster in Hercules

A little fun project before I guided the mount to the Milky Way targets early in the morning. I programmed SGP for M13 from 10pm to 2am with the setup that I wanted for the "main" target of the night (keeping the mount busy). Of course I did not waste the chance to take images of M13 during this time, which explains the unusual combination of this image, conventional RGB with a superset of luminance from narrow band filters (Hα and SII, combined as H-HS-S). And I had some fun with it, which version B shows ;-).

B

Description: One can play around with Star Spikes Pro just for fun, and when this was showing up I liked it. Of course no real astronomical value, just a pretty picture (at least for me ;-)).

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C

Description: The version that will be used for the integration of an additional set of 2x Barlow images. Simple, straight, nothing fancy ;-).

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D

Description: Integrated approximately 4.5 hours of RGB data taken with the Explore Scientific with a 2x Barlow. PI actually gave up on the star alignment so that I had to do this on my own within PS, which is a darn time intensive task. But I believe the image became better ... well, my eyes are tired, maybe tomorrow morning it looks awful ;-).

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E

Description: Comparison of 1 year. Changes in equipment, better processing. I definitely like the one from this year better, but last years edition was not too bad. I will do this again next year ;-).

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F

Description: Added another set of acquired Hα data (last set), bumping the integration time to 23 hours.

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G

Description: Sub-selected approximately 10 hours worth of "best" LRGB data and processed from scratch. Chose the best single images due to eccentricity and FWHM.

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H

Description: It seems that the star reduction in PI when applying it too aggressively creates some fuzziness around the stars. Here a version without reduction.

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I

Description: Took a subset of the least elongated subs and reprocessed.

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ZWO ASI1600MM/QHY163M
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Status	Advanced success
Started	...
Astrometry.net job	5249870
PixInsight job	3PO96U111GHTG0LM4KJ5WZJTYZL6M217
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	16h41m44s.40
RA (top/left)	16h43m41s.80
RA (top/right)	16h44m12s.24
RA (bottom/right)	16h39m44s.43
RA (bottom/left)	16h39m17s.60

Dec (center)	+36°27′20″.10
Dec (top/left)	+35°45′27″.5
Dec (top/right)	+37°05′07″.2
Dec (bottom/right)	+37°09′03″.7
Dec (bottom/left)	+35°49′24″.2

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