NGC 3198 Galaxy (Ursa Major) with 8" f/4 astrograph

[Dan_Paris]

 Hi

 

NGC 3198 is a barred spiral in Ursa Major about 47 millions l.y. from us. I imaged it on last Sunday night from my suburban backyard (Bortle 7/8) with hazy sky but good seeing. The median FWHM on the luminance is 1.8".

Here is the full FOV, with many small galaxies in the frame (right-click for full-res) :

And a  crop on the galaxy:

 

clear skies,

 

Dan

 

Technical details

200/800 custom Newtonian astrograph with Romano Zen optics and carbon fiber tube
AP900 CP4 mount on Losmandy HD tripod

ASI183mm (0.66"/pix)
TS 2.5" Riccardi-Wynne corrector
ZWO LRGB filters
Guiding : ZWO OAG + ASI120mm mini + AsiairV1
Luminance : 345 *60sec
Chrominance : 30*60sec for each R, V and B filter
Conditions : Bortle 7/8 skies in Paris' suburbs (20km from the Eiffel tower), good seeing, low transparency
Processing with Pixinsight

[assouptro]

Lovely! 
loads of little galaxies in the background and nice star colour! 
Thanks for sharing 

Bryan 

[Dan_Paris]

Thanks a lot Bryan !

 

I tweaked a bit the processing to enhance the outer parts of the galaxy:

 

What do you think ?

 

Clear skies,

 

Dan