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NGC 973

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#1 Dan Crowson

Dan Crowson

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Posted 17 October 2021 - 11:48 AM

IC 1815 (PGC 9794, UGC 2047 and others) is the barred spiral below it at about the same distance.

Luminance – 24x600s – 240 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2

360 minutes total exposure – 6 hours
NGC 973 (PCG 9795, UGC 2048 and others) is an edge on spiral galaxy located approximately 202 million light-years away in Triangulum.


Imaged October 17th and 18th and November 10th and 12th, 2020 from Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.

LRGB - https://www.flickr.c...661057/sizes/l/

See the link above because the attached image has been down-sampled.

NGC%20973%20-%20CN%20-%20LRGB.jpg

Dan


  • jimegger, rwstanley, Joe F Gafford and 14 others like this

#2 photobiker

photobiker

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Posted 17 October 2021 - 12:02 PM

Hey Dan, I'm in the early stages of learning mono.  Why did you switch from 1x1 bin with L to 2x2 with RGB?  Cut down exposure time or because RGB pass less light or both.

Ralph



#3 stargzr66207

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Posted 17 October 2021 - 06:04 PM

Dan,

Nice image!  973 looks like a miniature NGC-891!

Ron Abbott



#4 Ron (Lubbock)

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Posted 17 October 2021 - 07:22 PM

Reminds me of NGC 891 as well, except it's smaller and has an obnoxiously bright star right next to it.  Tough target!



#5 Dan Crowson

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Posted 17 October 2021 - 11:55 PM

Hey Dan, I'm in the early stages of learning mono.  Why did you switch from 1x1 bin with L to 2x2 with RGB?  Cut down exposure time or because RGB pass less light or both.
Ralph


Ralph,
 
that is just the way I learned with Adam Block. I think if you ask 100 people if you should do LRGB with the binning or just RGB un-binned that you'd probably end up around 50/50. If I was starting today, I would think about doing just RGB especially with the more sensitive cameras. At times the luminance can really challenge the RGB signal yielding 'unnatural' colors.

Dan



#6 ngc1535

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Posted 18 October 2021 - 02:46 AM

Ralph,
 
that is just the way I learned with Adam Block. I think if you ask 100 people if you should do LRGB with the binning or just RGB un-binned that you'd probably end up around 50/50. If I was starting today, I would think about doing just RGB especially with the more sensitive cameras. At times the luminance can really challenge the RGB signal yielding 'unnatural' colors.

Dan

 

You might enjoy this thread on the PixInsight forum that I wrote concerning LRGB and binning. 

https://pixinsight.c...728/#post-89563

-adam




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