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NGC300 - Galaxy processing, critique & advice please

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#1 BrettD

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Posted 26 September 2021 - 10:26 PM

ROUND STARS AT LAST!!!!    Well after feeling like I had addressed everything else I finally opened the mount and did some tweaking (after watching everything a search for "CGX backlash" on youtube could show me).

 

I found what is apparently not uncommon ... the RA motod did not have the required springy recoil.  A few cautious adjustments, and last nights session was guiding like a champ!

 

Now I think I need some tips on how best to process galaxy images.

I have here 5 hours (100 x 180s) no filter, with the 8" EdgeHD (with .7 reducer).

My process was like this:

  1. Stacked and did basic processing in APP (gradient removal / color calibration / stretch)

  2. Remove stars with Starnet++ (left lots behind on this image)

  3. Tweaked in Gimp, and recombined with the stars.

Full image / details on AstroBin

 

gallery_339491_17450_223174.jpg

 

Brett


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#2 Oort Cloud

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Posted 26 September 2021 - 10:32 PM

Looks great! Have you considered adding some Ha data?

#3 chanrobi

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Posted 27 September 2021 - 12:28 AM

Now need to fix CA :D



#4 zxx

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Posted 27 September 2021 - 01:48 AM

What Bortle sky ?  Can you go longer then 180s ?



#5 imtl

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Posted 27 September 2021 - 08:24 AM

Brett,

 

I took a look at your ABIN version and since you asked for critique then here are a few things I'm seeing.

 

1. I suggest a lot more integration on this object. The combination of the F/7 and the OSC needs more than 5h in my opinion. I would double it at least.

 

2. You got some serious artifacts from your processing. It shows very clearly in your background, your stars and the galaxy itself.

 

3. I'm afraid your stars are far from being round across the FOV. It looks like you need to play with your backspacing more.


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