About image
NGC 1961 is a galaxy in Camelopardalis constellation.
Its distance is 180 million light years and its apparent size is 4'x3'; it is the largest member of a small group of ten galaxies.
Due to its perturbed form on the southern spiral arm, it was also classified like Arp 184.
However there is no trace of an interaction with a companion.
Radio observation suggests that NGC 1961 is indeed an "intruder" inside the small galaxy group: by entering the group, this galaxy piles up the gas in the group medium, compressing it on its southern side, leading to the perturbation on the spiral arm that we see in the image.
(source: The Cambridge Photographic Atlas of Galaxies)