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Messier 33 - The Triangulum Galaxy - 5.5 hours of OSC integration

astrophotography dso imaging
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#1 pcos

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Posted 28 September 2020 - 09:53 AM

M33, also known as NGC 598, or more commonly known as the Triangulum Galaxy, is located 2.73 Million Light Years away and is the third largest member of the local group of galaxies which includes M31  the Andromeda Galaxy and our own Milky Way.  It is a spiral form galaxy - once of the first spiral galaxies identified as such back in 1850. It is one of the most distant objects that can seen with the unaided eye.

 

I shot my first version of this about a year ago when I first started doing Astrophotography and I recently revisited it and I was pleased with the improvements in this new instance.  Like many location within the US, we have been suffering from Smoky skies from the fires out west.  We had a break in this when an cold Canadian air mass dipped down into our area and push the smoke plug to the south of us.  

 

This image is the result of 130x150 sec exposures for a total integration time of about 5.5 hours taken over two nights on 20th and 21st of September. 

 

The high res version of this image can be seen at: https://astrob.in/mz7hp2/0/

 

Thanks for looking!

PCos

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Image details:
130 x 150 seconds, bin 1x1 @ -15C, unity gain
50 Bias exposures
25 Dark exposures bin 1x1 @ -15C, , unity gain
50 Flats

 

Hardware:
Scope: William Optics 132mm FLT F/7 APO
Guide Scope: Apterna 60mm
Camera: ZWO ASI294MC-Pro
Guide Camera: ZWO ASI290Mini
Focus Motor: Pegasus Astro Focus Cube 2
Field Rotator: Pegasus Astro Falcon
Mount: Ioptron CEM60
Polar Alignment: Ioptron Ipolar integrated alignment cameras

Capture Software:
Capture Software: PHD2 Guider, Sequence Generator Pro

Image Processing:
Stacking: Deepsky Stacker
Image Processing:  Pixinsight and PhotoShop, along with Coffee, extensive processing indecision and second guessing, editor regret and much swearing…..

Attached Thumbnails

  • m33_nonlin2-small.jpg

  • bill w, CCD-Freak, psandelle and 18 others like this

#2 alvarete

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Posted 28 September 2020 - 09:59 AM

Wonderfull
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#3 sunnyday

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Posted 28 September 2020 - 10:11 AM

super details and colors , thanks .


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#4 elmiko

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Posted 28 September 2020 - 09:24 PM

Very nice image Patrick! This is a tricky object to process correctly. You did a great job!



#5 pcos

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Posted 29 September 2020 - 07:17 AM

Very nice image Patrick! This is a tricky object to process correctly. You did a great job!

Thank you Mike - I agree - M33 was more challenging than I expected for processing.  It has a very "granular" structure and getting the NR/Smoothing balance right was interesting.  This will be one image I revist for processing during the cloudy months ahead...

 

Pat



#6 Mert

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Posted 29 September 2020 - 04:28 PM

Lovely result, great job
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