M51 HaLRGB (Rodd Dryfoos)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: IC 4277 · IC 4278 · M 51 · NGC 5194 · NGC 5195 · Whirlpool Galaxy

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M51 HaLRGB

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M51 HaLRGB

I was never satisfied with my TOA 130 M51. It is a galaxy where incredibly subtle changes have major impacts on the image. Brightness was the big one here--I continually had to notch it down as it crept upward. And as I brought the brightness down (in ever so slight increments), the saturation would creep up--especially the Ha. I was careful to avoid processing artifacts--especially from deconvolution. The core needs work, but there, I think, there is not much more in the data. The one aspect of the data set that is beyond help is the faint extensions of the galaxy and its companion. I would need much more data to adequately portray the extensions as seen in deep images of M51. That's a tough challenge at F7.7 with 5" scope in poor skies. At least I picked it up a bit. So until next time, after I improve my skills, this version will have to do. The data, no doubt, has more to yield--except, perhaps, for the core and extensions.

CU

Description: z2r4 - final adjustments

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CW

Description: Reprocess zz2

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CX

Description: zz4

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CY

Description: zz6

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CZ

Description: zz7

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Status	Advanced success
Started	...
Astrometry.net job	9549915
PixInsight job	QTAE0NBBTXVBVLBWSTQFHBUB8QI1H60P
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	13h29m51s.342
RA (top/left)	13h31m31s.936
RA (top/right)	13h28m02s.993
RA (bottom/right)	13h28m11s.718
RA (bottom/left)	13h31m39s.191

Dec (center)	+47°12′39″.25
Dec (top/left)	+47°26′29″.30
Dec (top/right)	+47°24′36″.92
Dec (bottom/right)	+46°58′44″.97
Dec (bottom/left)	+47°00′34″.81

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M51 HaLRGB

M51 HaLRGB

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M51 HaLRGB

M51 HaLRGB

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CU

CW

CX

CY

CZ

Sky plot

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