MWC 349 [SEP] constellation
MWC 349
MWC 349 is a double (likely, triple) star system in the constellation Cygnus. Its properties are still debated and it may be a massive highly luminous star or a very young less luminous Herbig Ae/Be star. MWC 349 is also a variable star with the designation V1478 Cygni.
MWC 349A and B and a third star.
MWC 349 is a resolved double star, with its components separated by 2.4 arc seconds. The primary, MWC 349A, is a B[e] star, where
has not been observed but would help to explain some unusual properties of the system.
Features.
MWC 349B appears to be a relatively conventional hot giant star, but MWC 349A is a very unusual object. It is a supergiant B[e] star, indicating that it is a luminous star with high mass loss and a disc of surrounding material. These features are shared by pre-main-sequence stars and evolved very massive stars, and it is unclear which category MWC 349A falls into.
MWC 349 is one