hip-117447

Its story

6 Cassiopeiae is a white A2.5 hypergiant, a stellar rarity: about twenty-five times the Sun's mass and close to two hundred thousand times its luminosity, a member of the Alpha Cygni family of variables that flicker faintly and erratically through internal pulsations. It shines within the recognisable W of Cassiopeia, the five-star outline many people learn to find on their very first night under the sky.