M27 Widefield - HaOIII-RGB (Anis Abdul)

Celestial hemisphere: Northern · Constellation: Vulpecula (Vul) · Contains: 14 Vul · Dumbbell Nebula · M 27 · NGC 6853 · PK060-03.1 · PK060-04.1 · The star 14Vul

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M27 Widefield - HaOIII-RGB

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M27 Widefield - HaOIII-RGB

With large moon in play last few weeks, I was looking for narrowband targets. I havent shot M27 in widefield and it was away from Moon to avoid interference in O3 band. I was originally planning to do a straight Ha-OIII showcasing the halos. However, the star colors in Ha/OIII always bother me. I shot some RGB subs to do star replacement.. Which turned out to be much harder in this dense starfield. It always resulted in bad artifacts.

Instead, I added Ha to R and OIII to B and build a RHa-BOIII-G for the PN and RGB for stars and I like this much better. The halos also stand out nicely.

I like the dense starfield and I am glad I shot RGB instead of pure HaOIII. The colorful stars and dark lanes give a nice "dirty" look to the overall image.

It was a bonus to see another little PN PK06-04.1 on the right side.. the mapping allows it to standout with its purple color.

Processed in PI and PS.

Shot From Nov1 - Nov 8

Ha - 27x15 mins

OIII - 20x15 mins

RGB - 12x5 min / channel

-Notes for New Revision

I finally tried starnet++ and it is amazing in PI in removing stars. Very simple and clean.. I had a faint Ha band on the top and very faint Ha signal that I couldnt show when I did star replacement last time. But with the starnet++ star removed image, the stars were removed but all background signal was left as is. It made re-adding RGB stars easier.

So this is a true HaOIII + RGB stars. I need to practice more to get this method down in my workflow.

Original
Final
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Description: - Reprocessed with Starnet++ for star removal in HaOIII image
- Added back RGB stars in the starless image.
This results in showing the red Ha nebulosity in the top of the image

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Status	Advanced success
Started	...
Astrometry.net job	3999755
PixInsight job	8MEWY67EVVBS70HY2D8TFECJQWZN612C
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	19h59m39s.51
RA (top/left)	19h54m36s.40
RA (top/right)	19h53m49s.78
RA (bottom/right)	20h04m34s.30
RA (bottom/left)	20h05m38s.57

Dec (center)	+22°50′46″.7
Dec (top/left)	+24°47′48″.7
Dec (top/right)	+21°01′31″.0
Dec (bottom/right)	+20°53′06″.0
Dec (bottom/left)	+24°39′12″.9

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M27 Widefield - HaOIII-RGB

M27 Widefield - HaOIII-RGB

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M27 Widefield - HaOIII-RGB

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