NGC2841 (lowenthalm)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: NGC 2841 · PGC 2387030 · PGC 2387317 · PGC 26572 · TYC3431-219-1 · TYC3431-625-1

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NGC2841

Acquisition type: Lucky imaging

Powered byPixInsight

NGC2841

Acquisition type: Lucky imaging

Seeing was not great, with 2.5 to 3 arc second FWHM stars. I am not sure that this isn't mild tube currents around the mirror in my SCT (I am still waiting for my mirror fans to arrive). For some reason the nights with best seeing at my location tend to be in the late spring and summer months. Something to do with the jet stream location over the Pacific Northwest, I guess.

This galaxy was in the darkest part of my suburban sky, so I decided to go deep with a lot of images and see what I got. The result was pretty decent, despite the seeing being so-so. Its a handsome spiral galaxy with a dense network of dust lanes. A faint halo with an additional band of dust across it can also be seen. From a darker site more of the faint halo would have been visible, no doubt.

The distance estimates for this galaxy vary wildly over the last 15 years. Cepheid, Tully-Fischer and redshift measurement techniques each giving different results. The most recent estimate from 2019 puts it at 53 million light years. Not counting the faint extended halo, the galaxy is about 3 x 7 arc minutes, so at the above distance, that would make the galaxy roughly 107,000 light years across, very similar to the size of the Milky Way.

Each of the 41 images stacked to produce this image was a live stack (using SharpCap) of 135 x 4 second exposures.

Original
Final
B

B

Description: I hadn't figured out the difference in color correcting my dob and SCT images yet, causing my SCT images to come out way too red. Got better at processing my he SCT images too, so brought that knowledge to this rework as well.

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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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Status	Advanced success
Started	...
Astrometry.net job	6897529
PixInsight job	V8423LYGHJ5Q6HUTQLP2CLADT6ZPWTN3
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	09h22m02s.600
RA (top/left)	09h23m30s.722
RA (top/right)	09h20m32s.823
RA (bottom/right)	09h20m35s.680
RA (bottom/left)	09h23m31s.741

Dec (center)	+50°58′34″.50
Dec (top/left)	+51°08′01″.60
Dec (top/right)	+51°07′37″.73
Dec (bottom/right)	+50°49′03″.88
Dec (bottom/left)	+50°49′26″.85

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