NGC 3184 is a spiral galaxy approximately 40
million light-years away in the constellation Ursa Major. It has
two HII regions named NGC 3180 and NGC 3181. NGC 3184 is notable
for its high abundance of heavy elements and a magnitude 14 Type
II supernova detected on December 9, 1999 (SN 1999gi). Other
supernovae in NGC 3184 include 1921B (mag 13.5), 1921C (mag 11)
and 1937F (mag 13.5).