"SN2013df (RA 12 26 29.33, Dec. +31 13 38.3), discovered June 7, 2013 in the galaxy NGC 4414 (offset 32E 14N), 14.4 magnitude, type IIb SN discovered by Fabrizio Ciabattari and Emiliano Mazzoni with the 50cm Newton telescope at Mount Agliale (Lucca). " [Report from Italian Supernovae Search Project]

NGC 4414 is an unbarred spiral galaxy about 62 million light-years away in the constellation Coma Berenices. It is a flocculent galaxy, with short segments of spiral structure but without the dramatic well-defined spiral arms of a grand design spiral. In 1974 a supernova, SN 1974G, was observed and is the only supernova in this galaxy to be recorded so far. NGC 4414 is also a very isolated galaxy without signs of past interactions with other galaxies[4] and despite not being a starburst galaxy shows a high density and richness of gas -both atomic and molecular, with the former extending far beyond its optical disk.[Text adapted from Wikipedia]