Triangulum galaxy (M33) from Paris

[Dan_Paris]

   Hi,

here is a picture of a fall favorite, M33, from my backyard in Paris' suburbs, over the last days with a 200/800 Newtonian.  There is overall nearly 8h of luminance, 5h of H-alpha and 4h of chrominance. Thanks to the small pixels of the camera and the rather good seeing conditions (FWHM is 2" in the luminance stack and 1.75" in the H-alpha stack) the amount of detail is rather nice (right-clic for the full resolution):

 

 

Thanks for looking and clear skies,

 

Dan

 

Technical data

200/800 custom Newtonian astrograph with Romano Zen optics and carbon fiber tube
AP900 CP4 mount on Losmandy HD tripod
TS 2.5" Riccardi-Wynne corrector
ASI183mm
ZWO LRGB filters
Guiding : ZWO OAG + ASI120mm mini + AsiairV1
Luminance : 461 *60sec at -10°C, gain 111

H-alpha : 57*300sec at -10°C, gain 111 for each channel
Chrominance : 75*60sec at -10°C, gain 111 for each channel
Darks, flats and biases
Conditions : Bortle 7 skies in Paris' suburbs (20km from the Eiffel tower), rather good seeing.
Processing with Pixinsight

Edited September 21, 2022 by Dan_Paris

[Elp]

A lot of fine detail in this, well done

[Richard_]

Beautiful image Dan, well done! 

[Paul M]

That's a magnificent image, nicely processed. 

[Dan_Paris]

Thanks a lot @Elp, @Richard_ and @Paul M, glad that you liked it.

 

Here is a new and perhaps better processing, with more balanced color and better noise reduction.

 

 

clear skies,

 

Dan

[peter shah]

Nicely done Dan, the latest process is a lot better, beautiful detail and star colour...great image

[Dan_Paris]

Thanks Peter, we should always way for version two before posting !

 

clear skies,

 

Dan