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6 Cassiopeiae A is a white A2.5 type hypergiant. It is about 25 times as massive as the Sun and 200,000 times as luminous. The star is slightly and erratically variable, an Alpha Cygni variable.
A hypergiant (luminosity class 0 or Ia +) is a very rare type of star that has an extremely high luminosity, mass, size and mass loss because of its extreme stellar winds. The term hypergiant is defined as luminosity class 0 (zero) in the MKK system .
Hypergiant is an Austin, Texas based technology company, [5] founded in February 2018, [4] and currently headed by CEO Mike Betzer. [ 3 ] [ 6 ] The company develops artificial intelligence (AI) products, [ 7 ] focused on its CommandCenter Platform.
A yellow hypergiant. HD 271182: 621 [126] Large Magellanic Cloud L/T eff: A yellow hypergiant. HD 33579: 471 [124] Large Magellanic Cloud L/T eff: The brightest star in the Large Magellanic Cloud. S Doradus: 100 [127] Large Magellanic Cloud L/T eff: A luminous blue variable in the S Doradus instability strip. HD 37974: 99 [128] Large Magellanic ...
Rho Cassiopeiae (/ ˌ r oʊ k æ s i ə ˈ p iː aɪ,-s i oʊ-,-iː /; ρ Cas, ρ Cassiopeiae) is a yellow hypergiant star in the constellation Cassiopeia.It is about 8,150 light-years (2,500 pc) from Earth, yet can still be seen by the naked eye as it is over 300,000 times brighter than the Sun.
Stephenson 2 DFK 1, also known as RSGC2-01 [a] or St2-18, is a red supergiant (RSG) or possible extreme red hypergiant [2] (RHG) star in the constellation of Scutum.It lies near the open cluster Stephenson 2, which is located about 5.8 kiloparsecs (19,000 light-years) away from Earth in the Scutum–Centaurus Arm of the Milky Way galaxy, and is assumed to be one of a group of stars at a ...
A giant star has a substantially larger radius and luminosity than a main-sequence (or dwarf) star of the same surface temperature. [1] They lie above the main sequence (luminosity class V in the Yerkes spectral classification) on the Hertzsprung–Russell diagram and correspond to luminosity classes II and III. [2]
Wray 17-96 (unusual hypergiant in the gap between the two semi-stable LBV regions) Pistol Star (once thought to be the most luminous star in the galaxy) LBV 1806-20 (one of the most luminous stars known) Sanduleak -69° 202 (the star that exploded as SN 1987A) Cygnus OB2-12 (blue hypergiant and one of the most luminous stars known) HD 80077 ...