The galaxy, which was discovered by French astronomer Pierre Mechain in 1781, was discovered by the Great Bear / Ursa Major and the Canes Venatici. It is considered as one of the finest galaxies among the discovered galaxies. After Pierre Mechain's friend and colleague Charles Messier named M106. Whose official name is NGC 4258. The distance from Earth to about 23.5 million light-years spiral is 60,000 light-years of this galaxy diameter. The galactic hall in the center of this galaxy is active