M27 - The Dumbbell in SHO (Christopher Stobie)

Celestial hemisphere: Northern · Constellation: Vulpecula (Vul) · Contains: Dumbbell Nebula · HD345444 · HD345445 · HD345446 · HD345447 · HD345448 · HD345449 · HD345450 · HD345451 · HD345452 · HD345453 · HD345454 · HD345455 · HD345457 · HD345458 · HD345461 · HD345463 · HD345465 · HD345469 · HD345470 · M 27 · NGC 6853 · PK060-03.1

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M27 - The Dumbbell in SHO

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M27 - The Dumbbell in SHO

Had not seen a Dumbbell SHO image I was overly fond of, so decided to give it a try myself.

Processing on this image:

Gradient Correction with GraXpert
Create RGB stars from SHO data

R = 0.4 * Ha + 0.6 * Sii
G = 0.4 * Oiii + 0.3 * Ha + 0.3 * Sii
B = Oiii

Image Solve
SpectophotometricColorCalibration
Stretch using GHS
Remove stars and save as stars, delete other image file
Remove stars from Ha, Sii, Oiii
Stretch Ha, Sii, Oiii using GHS, with GHS I generally like to stretch the core to get the detail I want, then use a series of masks to protect the core while I stretch the fainter nebulosity further
Now I create two color images

1 traditional SHO, R=Sii, G=Ha, B=Oiii
Foraxx Palette

I create the Foraxx palette because I believe the fainter nebulosity benefits from it's color palette far better than it would if I went through a series of stretches and color adjustments on SHO
I take the SHO and Foraxx into Photoshop and using masks and layers, bring the core out from SHO and leave the outer nebulosity in Foraxx
Back into Pixinsight I will do a blurxterminator and noisexterminator
ImproveBrilliance Script
Add back stars with Pixinsight

With that resulting image I go

Constructive Critique Requested
Cloudy Nights
Imaged with N.I.N.A.
QHY Users Group
QHYCCD QHY600 Images
/r/astrophotography

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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.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
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Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
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Status	Advanced success
Started	...
PixInsight job	3Y7W3MHUDH3AMNV0U3WZWEGDKV06H0LS
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	19h59m37s.144
RA (top/left)	19h58m21s.519
RA (top/right)	20h00m21s.912
RA (bottom/right)	20h00m53s.120
RA (bottom/left)	19h58m52s.317

Dec (center)	+22°43′21″.65
Dec (top/left)	+22°35′46″.34
Dec (top/right)	+22°27′21″.59
Dec (bottom/right)	+22°50′55″.85
Dec (bottom/left)	+22°59′20″.61

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M27 - The Dumbbell in SHO

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