NGC 3754 is a small barred spiral galaxy located in the constellation Leo. It is located 447 million light-years away from the Solar System and was discovered on April 5, 1874, by Ralph Copeland.
The luminosity class of NGC 3754 is II and it is listed as a LINER galaxy by SIMBAD, meaning, a nucleus presenting an emission spectrum characterized by broad lines of weak ionized atoms.
Copeland Septet
NGC 3754 is a member of the Copeland Septet which is made up of 7 galaxies discovered by Copeland in 1874. The other members of the group, are NGC 3745, NGC 3746, NGC 3748, NGC 3750, NGC 3751 and NGC 3753.
Halton Arp noticed the 7 galaxies in an article published in 1966. This group is designated as Arp 320 in which PGC 36010 is part of them.
The 7 galaxies were also observed by Paul Hickson, in which he included them inside his article in 1982. This group is known as Hickson 57, in which NGC 3754 is designated as HCG 57D.