M 51 - wide field - L-HaRGB (Rodolphe Goldsztejn)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: IC 4263 · IC 4277 · IC 4278 · M 51 · NGC 5169 · NGC 5173 · NGC 5194 · NGC 5195 · NGC 5198 · PGC 2281785 · PGC 2282749 · PGC 2286797 · PGC 2287260 · PGC 2287732 · PGC 2289559 · PGC 2289565 · PGC 2292105 · PGC 2294282 · PGC 2294604 · PGC 2297248 · PGC 2297311 · PGC 2300341 · PGC 2790855 · PGC 47274 · PGC 47323 · Whirlpool Galaxy

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M 51 - wide field - L-HaRGB

Revision title: Reworked

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M 51 - wide field - L-HaRGB

Revision title: Reworked

I was surprised by the number of small galaxies visible in that field.

Processing was not an easy, straightforward task: delinearisation was performed by blending HT and MS, separately on the luminance and the RGB channels, by removing and reinserting the stars. Luckily SXT was of great help in that process. I tried GHS as well, but its outcome was less convincing than those obtained "manually".

Anecdotically, I mistakenly shot 100s Red subs the first night, instead of the usual 600s - typing error in Voyager! I was quite lucky to be able to launch another capture session on Feb 20 focusing on the Red channel.

Hope you like it too.
CS
- Rodolphe

Original
B
C
D
Final
E

C

Title: LRGB - Red channel increased thanks to more subs captured

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D

Title: LRGB version - wide field

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E

Title: Reworked

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Status	Advanced success
Started	...
Astrometry.net job	9253775
PixInsight job	WPSGSVGB9QB7PRQVQHK75UK1MPKDESUB
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	13h29m34s.341
RA (top/left)	13h31m47s.288
RA (top/right)	13h31m49s.324
RA (bottom/right)	13h27m18s.533
RA (bottom/left)	13h27m22s.228

Dec (center)	+47°01′17″.58
Dec (top/left)	+46°27′27″.27
Dec (top/right)	+47°35′04″.99
Dec (bottom/right)	+47°34′59″.99
Dec (bottom/left)	+46°27′21″.20

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M 51 - wide field - L-HaRGB

Revision title: Reworked

M 51 - wide field - L-HaRGB

Revision title: Reworked

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M 51 - wide field - L-HaRGB

Revision title: Reworked

M 51 - wide field - L-HaRGB

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