Rho Cassiopeiae

Rho Cassiopeiae is a yellow hypergiant star, the brightest one in the night sky. It is located in the constellation Cassiopeia. It is also one of the largest, with a size 450 times larger than the Sun, but the star's mass is just 22 times larger than the Sun

Information

• Mass: 22 Solar Masses
• Radius: 636-981 Solar Radius
• Luminosity: 320,000-530,000 Solar Luminosities
• Temperature: 4,571-6,044 Kelvin
• Spectral Type: F8Ia⁺-K0Ia⁺

Rho Cassiopeiae Media

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  Location of Rho Cassiopeiae

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  Visual light curve for Rho Cas from 1933 to 2015

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  From left to right: the Sun (small, faint dot on the far left representing 1 R_☉ – too small to be visible in this thumbnail), the Pistol Star, Rho Cassiopeiae, Betelgeuse, and VY Canis Majoris. The orbits of Jupiter (♃ 5.23 AU) and Neptune (♆ 30.11 AU) are included for comparison.

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  ρ Cassiopeiae in optical light