NGC474 region

These are two elliptical galaxies, NGC474 and NGC467, with tidal shells of very unique shapes. They are in the constellation Pisces. These two galaxies are far apart, so I think they just happen to overlap, but the bluish galaxy NGC470 is actually close to NGC474, and there is a theory that their gravitational interaction triggered the formation of the tidal shell of NGC474. It was fainter than I expected, and it was challenging for me to visualize well even with an exposure time of over 11 hours, but you can still see the multi-layered outer shell structure.