Mu Cephei

Mu Cephei, also known as Herschel's Garnet Star due to its red, garnet-like color, is a red hypergiant star in the Cepheus constellation. With a radius between 1,260 and 1,420 solar radii,^[1][2] or a diameter between 1.7 and 2 billion kilometers, it is one of the largest stars known. This means Mu Cephei is twice the size of the more famous star Betelgeuse.^[3] Mu Cephei is also 269,000 times brighter than the Sun.^[4] Mu Cephei is also the "prototype" of the semiregular variable star type.

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  Artist's picture

Mu Cephei compared to the Sun.

Related pages

• 119 Tauri
• Pi1 Gruis
• Antares
• Betelgeuse
• VV Cephei
• VY Canis Majoris