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UY Scuti (BD-12°5055) is a red supergiant star, located 5,900 light-years away in the constellation Scutum. It is also a pulsating variable star , with a maximum brightness of magnitude 8.29 and a minimum of magnitude 10.56, which is too dim for naked-eye visibility.
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 ...
In the latest stages of mass loss, before a star explodes, surface helium may become enriched to levels comparable with hydrogen. ... UY Scuti; VY Canis Majoris ...
UY Scuti: 909 [23] L/T eff: Initially reported 1,708 R ☉, making it the largest star, a 2023 measurement put the radius at a smaller value of 909 R ☉ based on the multimessenger monitoring of supernovae. [23] NR Vulpeculae: 908 [23] – 923 +62 −50 [25] L/T eff: KU Andromedae (IRC +40004) 900 [56] – 1,044 [55] L/T eff: V774 Sagittarii ...
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.
NML Cygni or V1489 Cygni (abbreviated to NML Cyg or V1489 Cyg) is a red hypergiant [4] or red supergiant (RSG) in the constellation Cygnus.It is possibly one of the largest known stars currently known, and is also possibly one of the most luminous and massive cool hypergiants, as well as one of the most luminous stars in the Milky Way.
UY Scuti is truly the king of stars, with candidates including PZ Cassiopeiae, VV Cephei A, VY Canis Majoris, KY Cygni, Westerlund 1-26, WOH G64, and NML Cygni. Nobody know who really is the largest star though, but it is best to say UY Scuti is the one. --Joey P. - THE OFFICIAL (Visit/Talk/Contribs) 05:58, 28 October 2017 (UTC)
The first documented sighting of RW Cephei dates back to 1746 when it was included in a star catalog compiled by James Bradley. [19] It has been described as a red star since at least the 1840s, [a] when Friedrich Wilhelm Argelander noted it as "very red" in his catalog. [20]