B-type main-sequence star
The two components of 53 Aurigae orbit each other every 39 years with an eccentricity of 0.557. The primary component, 53 Aurigae A, is chemically peculiar since it contains higher-than-normal amounts of manganese, but also europium, chromium, and mercury. It is a B-type main-sequence star, while the secondary component, 53 Aurigae B, is an early F-type main-sequence star. The total mass of the system is estimated to be .