HD 45166 is an exotic binary system containing a B-type star and what is called a quasi-Wolf-Rayet star, an object whose spectrum resembles that of a WR star, but is formed differently and is less massive. HD 45166 A is an extremely rare example, and was likely formed from the collision of two helium stars. HD 45166 A is also extremely magnetic, and so when it ends its life with a supernova, it will produce a magnetar.
How to install add-ons? Find out here.