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Old 04-08-2024, 09:08 PM
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Doogs38 (Alex)
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NGC6744 / Caldwell 101 - The Milky Way's Big Brother

Hi Everyone. Astro time has been limited lately but I did manage to shoot (in mono) NGC6744 over 6 nights, mostly under a very bright moon ... one takes what one can get when one is busy A couple of things:

. The gradients were a post-processing nightmare. I have not been successful in removing all gradients. Lesson: don't shoot under a full moon lol. Actually, I already knew that but thought I'd have a crack regardless

. Some of seti-astro's new PI scripts are awesome, especially auto DBE, star stretch, and 'what's in my image'. If you're not using them already, give them a try.

. I couldn't get a lot of detail in the outer arms due to the data being swamped by bright moonlight. I did however get enough data to see where the arm is relative to the 6744's satellite galaxy. That was enough to keep me happy.

. KISS. I chose a relatively straightforward workflow in PI and then Affinity Photo ... I've dumped PS after many years as PS/Adobe is a rip-off. In PI, for each channel, I simply reduced the gradient, rounded the stars, removed noise and then combined with LRGB Combo. Removed stars. Then, stretched starless version using GHS and tweaked curves, sat, detail etc followed by recombining with the stretched stars. I had a version of the final image with smaller stars but it seemed bland, so I gave the stars the love they deserve :-)

The attached image is ~27 hours of LRGB data, roughly combined (in APP) with another ~11 hours from last year. Nearly 40 hours is pretty good! Maybe I'll add to it in 2025. Thanks for looking. Alex
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Old 05-08-2024, 05:08 PM
ahmed_haider (Ahmed)
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That is a cracking picture! Well done to you sir!
Cheers
Ahmed

Quote:
Originally Posted by Doogs38 View Post
Hi Everyone. Astro time has been limited lately but I did manage to shoot (in mono) NGC6744 over 6 nights, mostly under a very bright moon ... one takes what one can get when one is busy A couple of things:

. The gradients were a post-processing nightmare. I have not been successful in removing all gradients. Lesson: don't shoot under a full moon lol. Actually, I already knew that but thought I'd have a crack regardless

. Some of seti-astro's new PI scripts are awesome, especially auto DBE, star stretch, and 'what's in my image'. If you're not using them already, give them a try.

. I couldn't get a lot of detail in the outer arms due to the data being swamped by bright moonlight. I did however get enough data to see where the arm is relative to the 6744's satellite galaxy. That was enough to keep me happy.

. KISS. I chose a relatively straightforward workflow in PI and then Affinity Photo ... I've dumped PS after many years as PS/Adobe is a rip-off. In PI, for each channel, I simply reduced the gradient, rounded the stars, removed noise and then combined with LRGB Combo. Removed stars. Then, stretched starless version using GHS and tweaked curves, sat, detail etc followed by recombining with the stretched stars. I had a version of the final image with smaller stars but it seemed bland, so I gave the stars the love they deserve :-)

The attached image is ~27 hours of LRGB data, roughly combined (in APP) with another ~11 hours from last year. Nearly 40 hours is pretty good! Maybe I'll add to it in 2025. Thanks for looking. Alex
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  #3  
Old 05-08-2024, 06:40 PM
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AstroViking (Steve)
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Yikes! If that's suffering from moonlight, what's your moonless-night image going to look like?

Very well done, indeed!!
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Old 06-08-2024, 08:17 AM
Mickoid (Michael)
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Excellent result! Your hard work certainly paid off here.
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Old 06-08-2024, 08:25 AM
Dave882 (David)
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Wonderful shot mate! You’ve really nailed the colour and I think it’s all very well balanced. 40hrs has helped get some amazing depth. Beautiful job!
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Old 09-08-2024, 04:38 PM
Plossl68 (Paul)
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Honestly, that image is a stunner! It’s images like this that keep us inspired.
Thanks for posting!
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Old 10-08-2024, 04:53 AM
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Spookyer (Brett)
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Nice one!
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Old 10-08-2024, 01:38 PM
AdamJL
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Brilliant. And thanks for the links to those scripts. I've not seen those before, they look very powerful!
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  #9  
Old 14-08-2024, 11:34 AM
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dugnsuz (Doug)
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Absolutely lovely - well worth the efforts you've put into it Alex


Liking the Seti scripts too - been using the Blemish Blaster on the dust motes I lazily didn't do any calibration frames for!!
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