Blue Horsehead IC4592

[E_ri_k]

My first attempt at this target, and I found it rather difficult because how faint it is. I stuffed up the framing a bit but I'm actually really happy with the end result. I had a bit of a strange gradient going on but also not sure because there is a fair bit of nebulosity going on and perhaps it is ok?

15 hours of luminance, and 2 hours each of RGB with the FSQ85 and ZWO6200.

https://www.astrobin.com/full/cjx550/0/

[glend]

I think it looks pretty good. That is alot of luminance for what is substantially a blue target. I had a look at your histogram on Astrobin. There is a fair amount of red but that is understandable in that area of the sky, but your blue looks comparatively weak. What tools are you using to process the colour?

[strongmanmike]

That's lovely and subtle but strangely also quite magnificent, great job :thumbsup:

Mike

[gregbradley]

Love the tight stars. That dark area looks like a dust area. A good result Erik.

Greg.

[E_ri_k]

Thanks Glen, yes it might have been a bit overkill but I looked at the 6hr set and felt it was a bit faint? You make a good point about the blue, and something I perhaps overlooked? Would you suggest matching the colour exposures a bit closer to the luminance? I’m using Pixinsight for all my processing, and I used the new Spectrophotomerty colour calibration tool. I have by no means mastered Pixinsight and there are many functions I don’t use! I will revisit it and try push the blue a bit more. Now that I think about it I never embedded an ICC profile.

Thanks for the feedback mate.

Erik

[E_ri_k]

Thanks Mike, appreciate it.

[E_ri_k]

Cheers Greg :)

[strongmanmike]

Meant to say, looks like the gradient you refer to (?) might be vignetting? Are you confident your flats are ok?

Mike

[E_ri_k]

Oh :lol: yeah I actually don’t know. I did use PI’s Gradient tool at some point. I might look at the flats again…

Erik

[E_ri_k]

Bit of a reprocess, hope the blue is not too punchy, though now looking at the original I agree it was not blue enough.

[Retrograde]

Nice blue-horsey Erik.

It's a big beast and it would be hard to fit it all in with a telescope.

[Dave882]

A very nice image - almost impossible to capture from my city location and rarely seen in much detail. Well done!

[E_ri_k]

Thanks Pete, bigger than I expected…


Thanks mate :)