Object name: NGC7490
NGC 7490 is a nice face on spiral in northern Pegasus about 270 million light-years distant by redshift. It has a fairly bright core but faint thin arms. My processing has greatly equalized this brightness difference in order to fit its wide dynamic range into that of a computer monitor. Still, the faintest arms are barely visible, especially the one going through the blue star north of the core. NED classifies it as Sbc, The NGC Project says Sb while Seligman says Sbc?. The spiral structure while obvious far from the core is very indistinct in toward the core making it appear the arms come from a region well outside the core. The northern faint arm that goes to the blue star to the north stops there and a new arm segment begins below the star. From my experience such an arm segment coming from nothing this far from a core is unique. Has some interaction caused this? The second blue arm out from the core on the right has a sudden odd quivering region that average to a straight line then resumes its expected curve as it passes a blue-white foreground star. As you've probably noticed I like galaxies that first appear "normal" but on closer inspection have an odd quirk or two. The wide faint arms make this galaxy quite large. I measure its extreme size on the FITS luminance stack at 210,000 light-years making this an unusually large spiral. It was found by Édouard Stephan on October 11, 1879.