NGC 3198 is a somewhat "soft" and extended spiral galaxy in the Great Bears's left-hind foot, close to the northern border of Leo Minor. In fact, the galaxy belongs to the Leo Spur of galaxies. At a distance of 47 million light-years, seen about 19 deg from edge on, the galaxy has an apparent size of 9.2 x 3.5 arc min, which corresponds to a real diameter of 125'000 light-years.
Telescope: RCOS 20" f/8.5
Mount: Paramount ME
Detector: Apogee U16M
Filters: Astrodon Gen 2
Exposures: LRGB 440:240:220:200 min (20 min subs)
Observatory: Sierra Remote, California