Helix nebula -Ha

Posted: Oct 9th, 2020

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NGC

Technical Info

Telescope/Lens: 360mm f/2.9

Camera: ZWO ASI 1600MM Pro

Mount: SW EQ8

Accessories: parracor2 (x1.15)

Exposure:

120 x 300" ISO/Gain: 139 - Ha 7nm

Blue zoneLight Pollution:

Krasnodar, Russia

Oct 8th, 2020

10 h 0 m

2235

Resolution: 2100x1507 px

Scale: 1274 KB

Fatalik

202

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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

9 Oct, 2020 Reply

Fatalik Replied to Peter Tiagunov

Then the hydrogen turns yellow ) resulting in a sub-Hubble half-liter )

10 Oct, 2020 Reply

Peter Tiagunov Replied to Fatalik

All good here: https://www.lightvortexastronomy.com/image-nebulae-ngc7293-helix-nebula-in-narrowband-bicolour-palette.html

11 Oct, 2020 Reply

Peter Tiagunov Replied to Peter Tiagunov

I didn't see any yellow there.

11 Oct, 2020 Reply

Peter Tiagunov Replied to Peter Tiagunov

Or just with half a liter?

11 Oct, 2020 Reply

Peter Tiagunov Replied to Peter Tiagunov

Or just with half a liter?

11 Oct, 2020 Reply

Fatalik Replied to Peter Tiagunov

I can't see what's there. The link won't open.

11 Oct, 2020 Reply

Peter Tiagunov Replied to Fatalik

try this one: https://www.astrobin.com/298173/

11 Oct, 2020 Reply

Fatalik Replied 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.

11 Oct, 2020 Reply

Peter Tiagunov Replied 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.

11 Oct, 2020 Reply

Fatalik Replied 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.

11 Oct, 2020 Reply

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