Topic summary
RW Cephei
RW Cephei is a K-typehypergiant and a semirregular variable star in the constellationCepheus, at the edge of the Sharpless 132H II region and close to the small open cluster Berkeley 94. It is among the largest stars known with a radius of 1,100 times that of the Sun (R☉), nearly as large as the orbit of Jupiter.
In 2022, the star underwent a "great dimming" event similar to Betelgeuse.
The temperature intermediate between the red supergiants and yellow hypergiants has led to it being variously considered as a red hypergiant or yellow hypergiant.