NGC 3172
NGC 3172 is a 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.
A Type Ia supernova, 2010af, was discovered in NGC 3172 in March, 2010.
