NGC 7331/Stephan's Quintet mosaic from Paris

[Dan_Paris]

  Hi,

 

here is a two-panel mosaic of this beautiful area of the sky, taken over three nights with my 200/800 newt from Paris' suburbs (Bortle 7/8). 

 

I had good seeing for the Quintet (2.1" FWHM) but for NGC 7331 conditions were a mixed bag, one night with good transparency but poor seeing (3" FWHM), and one night with decent seeing (2.2" FWHM) but clouds, strong winds and threats of rainfall. So for this panel I kept just 70 luminance frames for the stars and the galaxy core, and nearly all of them (330*60 sec) for the extensions and the background.

 

Here is the mosaic (right clic for full res):

Crop on the Quintet

 

 

Crop on NGC 7331 and the Deer Lick group

 

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 : 300 *60sec  for the quintet, 330*60sec for NGC7331
Chrominance : 45*60sec each channel for each panel
Darks, flats and synthetic biases
Conditions : Bortle 7/8 skies in Paris' suburbs (20km from the Eiffel tower), variable seeing (2.1" after to 3"), some clouds and wind
Preprocessing and stacking with Siril, processing with Pixinsight and Rawtherapee

 

Edited August 30, 2022 by Dan_Paris

[bomberbaz]

excellent work, a quick comparison to the JWST image (you were expecting this no doubt) shows you have captured quite a few of the smaller background galaxies in Stephan's Quintet. A resounding success given your skies and equipment. 👌

[Dan_Paris]

Thanks a lot Steve !

 

57 minutes ago, bomberbaz said:

a quick comparison to the JWST image (you were expecting this no doubt)

 

I had concerns about the outcome 😂

 

 

[MartinB]

Beautifully done Dan.  A treat for the eyes

[ncjunk]

oh that's absolutely stunning and of my favourite area of the sky.

I love these photos.

 

Neil

[mackiedlm]

these are fantastic images - especially considering your location and sky - brilliant work.

[Dan_Paris]

Thanks a lot  @MartinB, @ncjunk and @mackiedlm for your kind words !

 

Dan