****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 Carinae 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 2.4 mas. V337 Carinae has two companions listed in multiple star catalogues. Both are 13th-magnitude stars, component B 16.9 " and component C 25.9 " away. Component B is a distant background star, while component C is at about the same distance as V337 Carinae.