NGC 3750

NGC 3750 is a lenticular galaxy with a bar located in the constellation of Leo. It is located 450 million light-years from the Solar System and was discovered by Ralph Copeland on February 9, 1874.

NGC 3750 has a surface brightness of magnitude 23.7 and is classified a LINER galaxy by SIMBAD, meaning it has a nucleus, presenting an emission spectrum characterized by broad lines of weakly ionized atoms.

Copeland Septet
NGC 3750 is a member of the Copeland Septet which is made up of 7 seven galaxies discovered by Copeland. The other members are NGC 3745, NGC 3746, NGC 3748, NGC 3751, NGC 3753 and NGC 3754.

Halton Arp noticed the galaxies in the group, whom he published in his article in 1966. This group is designated as Arp 320 along with another galaxy, PGC 36010.

This group was also observed by Paul Hickson whom he included in his article in 1982. The group is known as Hickson 57, in which NGC 3750 is designated is HCG 57C.