NGC 3172

NGC 3172 is a lenticular galaxy located in the constellation Ursa Minor. It is the closest NGC object to the north celestial pole. Discovered by John Herschel in 1831, it is about 285 million light-years away and about 85 thousand light-years across.

Supernovae

Two supernovae have been observed in NGC 3172:

SN 2010af, was discovered by Tom Boles on 4 March 2010.
SN 2017gla, was discovered on by Giancarlo Cortini on 1 September 2017.