C 4657) in Canes Venatici can be seen just under Cor Caroli, in the direction of Denebola.
The famous Black Eye Galaxy (Messier 64) lies 19 degrees west and a little north of Arcturus, not far from M53. Its bright core can be seen in 4-inch and larger telescopes. The Needle Galaxy (NGC 4565), a famous edge-on spiral galaxy visible in small telescopes, is another object found in the upper corner of the Great Diamond, in Coma Berenices.
Coma Berenices is home to a number of other interesting objects, including the Coma Berenices Open Cluster (Melotte 111), a diffuse open cluster covering more than 5 degrees of the sky, and the Coma Cluster, a large cluster of galaxies approximately 321 million light years from Earth with two supergiant ellipticals at the core, NGC 4874 (Coma A) and NGC 4889 (Coma B).
Two galaxies belonging to the Virgo Cluster, Messier 85 and Messier 100, also lie in Coma Berenices, in the northern corner of the cluster, whose centre is located between Denebola and the star Vindemiatrix in Virgo. Other Messier galaxies that are members of the cluster include Messier 49, Messier 60, Messier 84, Messier 86 and Messier 87, also known as Virgo A. These galaxies are located in the constellation Virgo, near the border with Coma Berenices.
Cor Caroli can be used to find several famous deep sky objects that lie outside the Great Diamond, in the direction of the brightest stars of Ursa Major. The Sunflower Galaxy (Messier 63) lies about a third of the way from Cor Caroli to Alkaid, the star that marks the tip of the Big Dipper’s handle. The Whirlpool Galaxy (Messier 51) is located 3.5 degrees from Alkaid in the direction of Cor Caroli. The Cat’s Eye Galaxy (Messier 94) lies near Cor Caroli in the direction of Megrez, the star that marks the base of the Great Bear’s tail. The spiral galaxy Messier 106 can be found along a line drawn from Cor Caroli to Phecda, the star just under Megrez in the Big Dipper asterism. All four galaxies belong to Canes Venatici constellation.