Southern Cepheus: Garnet Star to Wizard nebulae (Arnie)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: 10 Cep) · 21 Cep · 22 Cep · 23 Cep · 27 Cep · Erakis (μ Cep) · NGC 7380 · The star 12 Cep · The star 18 Cep · The star 19 Cep · The star 20 Cep · The star Castula (ν Cep · The star The Garnet Star · The star δ Cep · The star ε Cep · The star ζ Cep · The star λ Cep

Southern Cepheus: Garnet Star to Wizard nebulae, Arnie

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Southern Cepheus: Garnet Star to Wizard nebulae

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Southern Cepheus: Garnet Star to Wizard nebulae

While waiting night after night for the supernova remnant I'm imaging to clear the trees, I imaged southern Cepheus with a 180mm telephoto lens just to have something to do. Turned out pretty good in it's own right. This is the main image; the revision is annotated with the various Sharpless emission and Barnard dark nebulae.
Details:
Nikon 180mm telephoto at f/2.8
ZWO ASI6200MM-Pro
ZWO H-alpha and RGB filters
H-alpha: 24 x 10 minutes
R, G and B: 10 x 30 seconds each

I processed this a little differently than ever before. For the nebulae, I created a blank RGB document in Photoshop. After removing the stars from my monochrome H-alpha image, I pasted it into the red channel of the new document at 80% opacity, pasted it again into the green channel at 5% opacity, and one last time into the blue channel at 15% opacity. I think it gave me much better color than just adding the H-a data to the red channel. After combining the RGB star data, I isolated the narrowband star data using the difference between the original H-a file and the starless one, then used this as a luminance channel for the stars. This tightened them up nicely. The star file was then laid on top of the H-a file using Linear Dodge blending mode.

If anybody knows the identity of the dark nebulae towards the lower center of the image, I'd love to hear from you!

Arnie

Final
Original
B

B

Title: Southern Cepheus: Garnet Star to Wizard nebulae (annotated)

Description: Annotated version showing Sharpless and Barnard catalog objects.

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