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NGC 4559 a faint galaxy


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Last weekend there were some clear nights in a row up here, which I could use perfectly despite a strong wind. I selected a rarely shown galaxy NGC 4559 in the constellation Coma Berenices. In 1941 a +13.2 mag type II supernova explosion was observed in this galaxy (SN 1941a). At first glance, it looks a bit like M33, but is only about 1/50 of the brightness. The image shows a series of background galaxies and groups of galaxies. The most prominent are IC 3598, IC 3593 and IC 3592.
The high surface brightness in the central area is deceptive, because the spiral arms are very weak and therefore difficult to image and rarely seen in pictures.




or https://www.astrobin.com/337886/0/



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