V337 Carinae

V337 Carinae (V337 Car, q Carinae) is a K-type bright giant star in the constellation of Carina. It is an irregular variable and has an apparent visual magnitude which varies between 3.36 and 3.44.

V337 has a spectral class of K2.5II, indicating a bright giant. It is considered likely to be on the red giant branch of stars fusing hydrogen around an inert helium core. However, with a mass nine times that of the Sun, it is also an accepted supernova candidate. Its limb-darkened angular diameter has been measured using interferometry at $8.2$.

V337 Carinae has two companions listed in multiple star catalogues. Both are 13th-magnitude stars, component B $2.4 mas$ and component C $16.9 "$ away. Component B is a distant background star, while component C is at about the same distance as V337 Carinae.