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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.
English: Size comparison of evolved red supergiant star Stephenson 2-18, extreme red hypergiant star VY Canis Majoris and luminous red supergiant star UY Scuti. Bahasa Indonesia: Perbandingan ukuran bintang super raksasa merah berevolusi Stephenson 2-18, bintang hypergiant merah ekstrim VY Canis Majoris dan bintang super raksasa merah bercahaya ...
Theoretical limit of star size (M31) ≳1,750 [9] L/T eff: Estimated by measuring the fraction of red supergiants at higher luminosities in a large sample of stars. Assumes an effective temperature of 3625 K. Reported for reference: LGGS J013339.28+303118.8 1,566 [129] Triangulum Galaxy: L/T eff: Theoretical limit of star size (M33) ≳1,500 [9 ...
Solar radius is a unit of distance used to express the size of stars in astronomy relative to the Sun. ... (432,300 miles) ... UY Scuti: 909 [9] 632,400,000 ...
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 ...
First, UY Scuti, is clearly using an outdated distance estimation, which could mean that its upper radius estimate is spurious. The lower radius estimate is derived from a questionable logL of 5.00 which is exactly the same as others in the paper, this luminosity could also be considered outdated.
Absolute magnitude is defined as the apparent magnitude that a star or object would have if it were observed from a distance of 10 parsecs (33 light-years; 3.1 × 10 14 kilometres; 1.9 × 10 14 miles). Therefore, it is of greater use in stellar astrophysics since it refers to a property of a star regardless of how close it is to Earth.
VV Cephei A was higher than VY CMa because 1050-1900 is 1475 so NML Cygni would be larger than UY Scuti because 1642-2775 is 2208.5 (3,075,742,614 Km) and UY Scuti is 1708 (2,378,704,272 Km). (posted by V255 Canis Majoris) 1050 - 1900 is not 1475. These are independent calculations by different authors.