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Sketches

Galactic field in Lacerta


Dan_Paris
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Hi,

this small constellation at the edge of the Milky Way is seldom visited, nonetheless it contains many interesting objects, including small but beautiful galaxies and lot of IFN.

Here is a field containing the barred spiral galaxy NGC 7223, interacting with the elliptical PGC 214803 as well as the spiral galaxies UGC 11919 and UGC 11927. I took this picture last night with my 8" newtonian astrograph from my light-polluted backyard in Paris suburbs.

Thanks to rather good seeing conditions (2.1" FWHM after stacking), I managed to extract interesting details from these small objects (NGC 7223 is 1,4′ × 1,1′ only), even with my 750mm focal length.

 

First a crop centered on the main galaxies:

lacerta_galaxies_crop.thumb.jpg.16245d788e68ff2ced8f4e9acd40595a.jpg

 

And the full picture, with several other galaxies and some traces of IFN in the upper part :

lacerta_galaxies.thumb.jpg.596d9cda35cb8f4c2f14d81f4145d66a.jpg

 

 

Thanks for looking,

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 : 180 *60sec at -10°C
Chrominance : 30*60sec at -10°C each channel
Darks, flats and synthetic biases
Conditions : Bortle 7/8 skies in Paris' suburbs (20km from the Eiffel tower), moderate seeing (2.1" after stacking), some clouds
Preprocessing and stacking with Siril, processing with Pixinsight and Rawtherapee

 

 

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