Class of massive star with a spectral type of A to K
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. They are amongst the most visually luminous stars, with absolute magnitude (MV) around −9, but also one of the rarest, with just 20 known in the Milky Way and six of those in just a single cluster. They are sometimes referred to as cool hypergiants in comparison with O- and B-type stars, and sometimes as warm hypergiants in comparison with red supergiants.
A yellowhypergiant (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...
groups such as the yellowhypergiants, RSG (red supergiants), or blue B(e) supergiants with emission spectra. More commonly, hypergiants are classed as Ia-0...
Giants Red giants Blue giants Bright giants Supergiants Red supergiant Hypergiants absolute magni- tude (MV) Supergiants are among the most massive and...
Cassiopeiae (/ˌroʊ kæsiəˈpiːaɪ, -sioʊ-, -iː/; ρ Cas, ρ Cassiopeiae) is a yellowhypergiant star in the constellation Cassiopeia. It is about 3,400 light-years...
Giants Red giants Blue giants Bright giants Supergiants Red supergiant Hypergiants absolute magni- tude (MV) Red supergiants (RSGs) are stars with a supergiant...
HR 5171, also known as V766 Centauri, is a yellowhypergiant in the constellation Centaurus. It is said to be either an extreme red supergiant (RSG) or...
Blue giants Bright giants Supergiants Red supergiant Hypergiants absolute magni- tude (MV) A yellow supergiant (YSG) is a star, generally of spectral type...
Wolfgang; Sigismondi, Constantino (July 2023). "The Great Dimming of the hypergiant star RW Cephei: CHARA Array images and spectral analysis". The Astronomical...
supernova will be produced by a different type of massive star such as a yellowhypergiant, luminous blue variable, or Wolf–Rayet. The chances of the next supernova...
decreases to around 8,500 K for all stars, slightly hotter than the yellowhypergiants. The bolometric luminosity usually remains constant, which means that...
HD 33579 is a white/yellowhypergiant and one of the brightest stars in the Large Magellanic Cloud (LMC). It is a suspected variable star. HD 33579 lies...
the red supergiants and yellowhypergiants has led to it being variously considered as a red hypergiant or yellowhypergiant. The first documented sighting...
B324 is a yellowhypergiant in the Triangulum Galaxy, located near the giant H II region IC 142 around 2.7 million light years away. It is the brightest...
asteroids gravitating toward each other until they touch. HR 5171, a yellowhypergiant previously thought to be a contact binary. KIC 9832227, a contact...
cluster members, and noted that its spectral type places it near yellowhypergiants on the Hertzsprung–Russell diagram (HR Diagram), though not as hot...
Philip; Meynet, Georges; Tokarz, Susan; Caldwell, Nelson (2009-08-27). "Yellow Supergiants in the Andromeda Galaxy (M31)". The Astrophysical Journal. 703...
Subdwarf O B WR OB Subgiant Giant Blue Red Yellow Bright giant Supergiant Blue Red YellowHypergiantYellow Carbon S CN CH White dwarf Chemically peculiar...
V509 Cassiopeiae (V509 Cas or HR 8752) is one of two yellowhypergiant stars found in the constellation Cassiopeia, which also contains Rho Cassiopeiae...
like UY Scuti should evolve back to hotter temperatures to become a yellowhypergiant, luminous blue variable, or a Wolf–Rayet star, creating a strong stellar...
Subdwarf O B WR OB Subgiant Giant Blue Red Yellow Bright giant Supergiant Blue Red YellowHypergiantYellow Carbon S CN CH White dwarf Chemically peculiar...
most luminous stars known belong to this class. Examples include the hypergiants η Carinae and P Cygni. They have permanent high mass loss, but at intervals...
VY Canis Majoris (abbreviated to VY CMa) is an extreme oxygen-rich red hypergiant or red supergiant (O-rich RHG or RSG) and pulsating variable star 1.2...
size and is determined by their surface gravity. These range from 0 (hypergiants) through III (giants) to V (main sequence dwarfs); some authors add VII...
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