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

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: HD117815 · IC 4263 · IC 4277 · IC 4278 · M 51 · NGC 5169 · NGC 5173 · NGC 5194 · NGC 5195 · NGC 5198 · PGC 2281785 · PGC 2282749 · PGC 2285407 · PGC 2286797 · PGC 2287260 · PGC 2287543 · PGC 2287732 · PGC 2289559 · PGC 2289565 · PGC 2290293 · PGC 2290538 · PGC 2290581 · PGC 2291430 · PGC 2292105 · PGC 2292718 · PGC 2293576 · PGC 2294282 · PGC 2294604 · PGC 2297248 · PGC 2297311 · And 15 more.

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M 51 - wide field - L-HaRGB

Revision title: LRGB version - wide field

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M 51 - wide field - L-HaRGB

Revision title: LRGB version - wide field

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	7224259
PixInsight job	P2YQRKMOZLLAMIWFYN7AMKN8CU20CS3P
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	13h29m59s.256
RA (top/left)	13h32m47s.734
RA (top/right)	13h32m52s.920
RA (bottom/right)	13h27m06s.380
RA (bottom/left)	13h27m11s.458

Dec (center)	+47°11′45″.81
Dec (top/left)	+46°27′12″.41
Dec (top/right)	+47°56′06″.40
Dec (bottom/right)	+47°56′04″.81
Dec (bottom/left)	+46°27′12″.76

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M 51 - wide field - L-HaRGB

Revision title: LRGB version - wide field

M 51 - wide field - L-HaRGB

Revision title: LRGB version - wide field

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M 51 - wide field - L-HaRGB

Revision title: LRGB version - wide field

M 51 - wide field - L-HaRGB

Revision title: LRGB version - wide field

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