NGC 3746

NGC 3746 is a large barred spiral galaxy with a ring structure located in the Leo constellation. It is located 449 million light-years from the Solar System and has an approximate diameter of 165,000 light-years. NGC 3746 was discovered by Ralph Copeland on 9 February 1874 with subsequent observations made by Hermann Kobold, Lawrence Parsons and John Louis Emil Dreyer.

The luminosity class of NGC 3746 is II and it has a broad H II region with a recessed core (RET).

Supernovae
Two supernovae have been discovered in NGC 3746 so far: SN 2002ar and SN 2005ba.

SN 2002ar

SN 2002ar was discovered by Dr W.D. Li from the University of California, Berkeley via unfiltered CCD images which was taken by the 0.8-m Katzman Automatic Imagining Telescope on 3 and 4 February 2002. It was located 3".3 east and 0".5 south of the nucleus. The supernova was Type la.

SN 2005ba

SN 2005ba was discovered on 1 April 2005 by Norwegian scientists Arne Danielsen, Mikkel Steine, and Stale Kildahl via unfiltered images taken from a 'Celestron 14' reflector at Veggli, Norway. It was located 14".6 west and 4".0 north of the nucleus. The supernova was Type II.

Copeland Septet
NGC 3746 is a member of the Copeland Septet which comprises 7 galaxies discovered by Copeland in 1874. The other 6 members are NGC 3748, NGC 3754, NGC 3753, NGC 3750, NGC 3745 and NGC 3751. Together, they are known as Hickson 57 and Arp 320.