M101 (Andy Brown)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: HD122865 · M 101 · NGC 5447 · NGC 5449 · NGC 5450 · NGC 5451 · NGC 5453 · NGC 5455 · NGC 5457 · NGC 5461 · NGC 5462 · NGC 5471 · NGC 5477 · Pinwheel galaxy

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M101

Revision title: Increase saturation and contrast

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M101

Revision title: Increase saturation and contrast

Pinwheel Galaxy (M101)

With the lack of clear nights recently I've been going through some old data and found two nights worth of the Pinwheel that hadn't been processed before. I've also been experimenting with various techniques for noise reduction in Photoshop.

The result of my experiments has been an improved workflow incorporating StarXTerminator and Topaz Denoise AI. I used a two pass process, removing the stars from the stretched, noisy image to make a star mask which I then used together with a luminosity mask to denoise the original layer. I then ran StarXTerminator a second time to remove the stars into a separate layer. This removed the blotches which remain after removing the stars from the noisy image and makes further edits easier and cleaner.

I'm much happier with the result achieved here albeit the stars are not great as this was shot with my Canon 600mm prime lens which has problems with drifting focus and blooming due to the aperture blades.

Original
Final
B

B

Title: Increase saturation and contrast

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Imaged with APT
IOptron CEM
FriendlyCosmos
ASI533MC Pro
The OSC Club (One Shot Camera)
UK Astro-Imaging

Galaxies

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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	5241312
PixInsight job	RRDPTH55EPO9PGIHI7HLEARWXULD8MG0
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	14h03m11s.93
RA (top/left)	13h59m46s.17
RA (top/right)	14h05m55s.80
RA (bottom/right)	14h06m41s.63
RA (bottom/left)	14h00m24s.67

Dec (center)	+54°21′22″.8
Dec (top/left)	+53°57′08″.5
Dec (top/right)	+53°51′01″.2
Dec (bottom/right)	+54°45′14″.8
Dec (bottom/left)	+54°51′31″.2

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M101

Revision title: Increase saturation and contrast

M101

Revision title: Increase saturation and contrast

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M101

Revision title: Increase saturation and contrast

M101

Revision title: Increase saturation and contrast

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