Mu Cephei [SEP] constellation
Mu Cephei
Mu Cephei (μ Cep, μ Cephei), also known as Herschel's Garnet Star, 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. Since 1943, the spectrum of this star has served as the M2 Ia standard by which other stars are classified.
Mu Cephei is visually nearly 100,000 times brighter than the Sun, with an absolute visual magnitude of −7.6. It is also one of the largest known
in this constellation, Mu Cephei and VV Cephei A.
V419 Cephei has a mass 16.6 solar masses, above the limit beyond which stars end their lives as supernovae. The life of such massive stars is very short. Despite its advanced evolutionary state, V419 Cephei is only 10 million years old.
Billed as an irregular variable star LC, V419 Cephei's brightness varies by 0.27 magnitude.