NGC 3718

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: NGC 3718 · NGC 3729

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NGC 3718

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NGC 3718

Imaging at F9 is tough! I decided to attempt a project that had a decent integration time to test out the 6" RC at it's native 1370mm focal length. This image was taken oven three nights although analysis of the subs, shows the third night was noticeably poor compared to the first. I'm not sure if this was sky related or dew on one of the mirrors perhaps.

At 1370mm FL and a 3.76um pixel camera, the imaging scale is around 0.57"PP. The image was rescaled to 50% before I started processing.

In rare clear UK skies (with minimal or no moon) 11 hours is a sizable chunk of your likely yearly hours and I can't help wondering if I'd have been as happy with a small, wider field view from my Redcat (or perhaps a slightly larger 500mm scope). I'm perhaps being overly harsh on a relatively challenging target and scope combo. Interested in any thoughts anyone has! Thanks for looking.

Captured with Voyager, stacked & calibrated in APP then processed in PixInsight.

Final
Original
B

B

Description: An example 120s sub from each of the three nights and the final stack - all shown at same image scale as final image.

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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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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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Status	Advanced success
Started	...
Astrometry.net job	4375298
PixInsight job	U6BDKLOK4CH3TEF23A7TNERA1LGO91UW
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	11h32m35s.33
RA (top/left)	11h30m54s.77
RA (top/right)	11h31m14s.61
RA (bottom/right)	11h34m14s.100
RA (bottom/left)	11h33m56s.98

Dec (center)	+53°04′04″.3
Dec (top/left)	+53°16′12″.7
Dec (top/right)	+52°48′59″.9
Dec (bottom/right)	+52°51′49″.5
Dec (bottom/left)	+53°18′58″.1

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