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Helix nebula -Ha

Fatalik
2023372
Category:Deep Sky
Published:
2793
Helix nebula -HaNGC 7293
Resolution:
2100x1507 px
File size:
1274 KB

Technical information

Telescope/Lens
360mm f/2.9
Camera
ZWO ASI 1600MM Pro
Mount
SW EQ8
Accessories
parracor2 (x1.15)
Location
Краснодар, Россия

Light pollution

Blue, Bortle 3 zone

Date taken

Exposure

  • 120 × 300″ · ISO/Gain: 139 · Ha 7nm

Total exposure: 10 h 0 m

Comments

Peter Tiagunov
I hope to see it in Synthetic Green Combination. Something like:
R/K: HA
G: (0.4*HA)+(0.6*OIII)
B: OIII
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FatalikReply to Peter Tiagunov
Then the hydrogen turns yellow ) resulting in a sub-Hubble half-liter )
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Peter TiagunovReply to Fatalik
All good here: https://www.lightvortexastronomy.com/image-nebulae-ngc7293-helix-nebula-in-narrowband-bicolour-palette.html
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FatalikReply to Peter Tiagunov
I can't see what's there. The link won't open.
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Peter TiagunovReply to Fatalik
try this one: https://www.astrobin.com/298173/
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FatalikReply to Peter Tiagunov
Hmm, I don't think that's it. G: (0.4*HA)+(0.6*OIII) =))

If you pour something close to half Hydrogen into the green channel...
It turns yellow =)

I've already whipped up and uploaded a version like that.
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Peter TiagunovReply to Fatalik
I said "like," but I don't know the exact formula—there seem to be 3 or 4. I saw a bicolor "filter" for Photoshop somewhere. I want to try it too.
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FatalikReply to Peter Tiagunov
When I want to create a bicolor image similar to the classic look of a planetary nebula in RGB, I simply blend HOO. Then red and green become dominant. If I experiment with the green channel, mixing hydrogen and oxygen there—I also like it; it starts to resemble Hubble’s palette, yellow and blue.
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