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Ngc3621
NGC3621 is listed as SA(s)d spiral with loosely wound arms. According to Wikipedia it has an active nucleus exhibiting a Seyfert type2 optical spectrum. There is no evidence of a bulge, and there is a black hole of 'up to 3 million Solar masses'. The galaxy is about 22Mly distant in Hydra, and is about 93kly across.
Whilst it is quite bright - Mag 10 - the arms are very faint, and the tricky processing is complicated somewhat by the bright foreground stars.
This LRGB image was shot over two reasonable nights with average seeing.
Total exposure time 290 minutes - clearly a lot more time would benefit the faint arms.
Mark
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