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Intrinsic variable types in the Hertzsprung–Russell diagram showing the Yellow Hypergiants above (i.e. more luminous than) the Cepheid instability strip. A yellow hypergiant (YHG) is a massive star with an extended atmosphere, a spectral class from A to K, and, starting with an initial mass of about 20–60 solar masses, has lost as much as half that mass.
While it is frequently described as a yellow supergiant, especially in evolutionary terms, [2] it is classified as a bright giant based on spectrum. [3] Sargas (θ Scorpii A) 329 ± 9 [5] F0Ib-F1III [6] or F0 II [7] 35.5 × 26.3 [5] 3.1 +0.37 −0.32 [5] 1.862 [8] Either a lower luminosity supergiant or a (bright) giant, formed after stellar ...
The massive RSGC1 cluster contains 14 red supergiants and one yellow supergiant. [8]Yellow supergiants have a relatively narrow range of temperatures corresponding to their spectral types, from about 4,000 K to 7,000 K. [9] Their luminosities range from about 1,000 L ☉ upwards, with the most luminous stars exceeding 100,000 L ☉.
In 1956, the astronomers Feast and Thackeray used the term super-supergiant (later changed into hypergiant) for stars with an absolute magnitude brighter than M V = −7 (M Bol will be larger for very cool and very hot stars, for example at least −9.7 for a B0 hypergiant).
While it is frequently described as a yellow supergiant, especially in evolutionary terms, [16] it is classified as a bright giant based on spectrum. [17] [16] List of nearest supergiants: Nearest hypergiant: μ Cephei (Herschel's Garnet Star) 3,060 light-years (940 pc) [18] Nearest carbon star: CW Leonis: 310 light-years (95 pc) Nearest M-type ...
HD 271182, occasionally referred to as G266 and R92, is a rare yellow hypergiant (YHG) and an Alpha Cygni variable.It is one of the brightest stars in the Large Magellanic Cloud (LMC), [10] positioned in the deep southern constellation of Dorado.
Rigel, the brightest star in the constellation Orion is a typical blue-white supergiant; the three stars of Orion's Belt are all blue supergiants; Deneb is the brightest star in Cygnus, another blue supergiant; and Delta Cephei (itself the prototype) and Polaris are Cepheid variables and yellow supergiants. Antares and VV Cephei A are red ...
B324 is a yellow hypergiant in the Triangulum Galaxy, located near the giant H II region IC 142 around 2.7 million light years away. It is the brightest star in the Triangulum Galaxy in terms of apparent magnitude .