NGC 3753

NGC 3753 is a large spiral galaxy with a bar located in the Leo constellation. It is located 435 million light-years away from the Solar System and was discovered on February 9, 1874, by Ralph Copeland.

NGC 3753 is classified as a LINER galaxy meaning, it presents an emission spectrum characterized by broad lines of weak ionized atoms. It also has a luminosity class of I-II.

Copeland Septet
NGC 3753 is a member of the Copeland Septet which consists of 7 galaxies discovered by Copeland in 1874. The other members are NGC 3746, NGC 3745, NGC 3748, NGC 3750, NGC 3751 and NGC 3754.

Halton Arp noticed the 7 galaxies in the group, in which he published the article in 1966. The group is designated as Arp 320 along another galaxy, PGC 36010.

This group was observed by Paul Hickson in which he included them in his article in 1982. The group is known as Hickson 57 in which NGC 3753 is the dominant member.