NGC 2841 is an unbarred spiral galaxy in the northern circumpolar constellation of Ursa Major. It is located around 45 milions light years from us. It was the target for a first light of my new 100 mm refractor. Again it was difficult to me to preserve all these tiny background galaxies with BlurXTerminator.
When I checked some of these background galaxies of what I sought to be a galaxy cluster in the South of NGC2841 with my favorite sky atlas
https://aladin.cds.unistra.fr/ I was surprised that these galaxies are not only not connected but some of them really far away from us. This can be easily understood by the redshift z values in the database. Please look at the zoom picture (version B) : Galaxy 1 : z = 0.0269, Galaxy 2 : z = 0.06845 and Galaxy 3 : z = 0.14319. For the later a quick approximate calculation gives more than 2 billions light-years (!). Quite amazing what you can capture with a 4 inch scope in a few hours under quite poor sky conditions (humidity and moon).
Also surprising to me : this galaxy is often shown much more yellow than in my picture although I used the new SPCC tool in Pxinsight ?
Enjoy and critics welcome,
Andreas
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