Mu Cephei

 Mu Cephei

Mu Cephei, also known as Herschel's Garnet Star, Erakis, or HD 206936, is a red supergiant or hypergiant star in the constellation Cepheus. It appears garnet red and is located at the edge of the IC 1396 nebula.

Information

Distance to Earth :- 2,838 light years

Radius :- 876.6 million km (1,260 R☉)

Surface temperature :- 3,690 K

Mass :- 3.819 × 10^31 kg (19.2 M☉)

Luminosity :- 283,000 L☉

Constellation :- Cepheus

Spectral type :- M2e Ia