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UY Scuti
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UY Scuti
Dense starfield around the red supergiant star UY Scuti (brightest star in the image) as seen from the Rutherfurd Observatory in the Columbia University in New York, United States. Picture is captured in 2011.
Observation data
Epoch J2000 Equinox J2000
Constellation
Scutum
Right ascension
18h 27m 36.5334s
Declination
-12° 27' 58.866?
Apparent magnitude (V)
11.2 (max)
13.2 (min)
Characteristics
Spectral type
M4Ia-Iab
U-B color index
3.29
B-V color index
2.6
Variable type
Semiregular
Astrometry
Proper motion (µ)
RA: 1.3 mas/yr
Dec.: -1.6 mas/yr
Distance
9,140 ly
(2,900 pc)
Details
Mass
32 M?
Radius
1,708 ± 192 R?
Luminosity
340,000 L?
Surface gravity (log g)
-0.5 cgs
Temperature
3,365 ± 134 K
Other designations
Database references
SIMBAD
data
Coordinates: 18h 27m 36.53s, -12° 27' 58.9?UY Scuti is a bright red supergiant or hypergiant pulsating variable star in the constellation Scutum. It is currently the largest known star at most likelihood, and is one of the most luminous and best-known of its kind. It has the average median radius of 1,708 solar radii, or a diameter of 2,378,704,272 km (1,478,914,185.73 mi; 15.9 AU); thus a volume 4,982,686,912 times that of the Sun. It is approximately 9,140 light-years (2,300 parsecs) from Earth, making it one of the nearest known hypergiants. If placed at the center of the Solar System, its photosphere would engulf the orbit of Jupiter, although the radius is poorly known and may be larger than the orbit of Saturn.
^ a b c International Variable Star Index. "Detail for UY Sct".
^ a b c d e Arroyo-Torres, B.; Wittkowski, M.; Marcaide, J. M.; Hauschildt, P. H. (2013). "The atmospheric structure and fundamental parameters of the red supergiants AH Scorpii, UY Scuti, and KW Sagittarii". Astronomy & Astrophysics 554: A76. doi:10.1051/0004-6361/201220920. edit
^ Sylvester, R. J.; Skinner, C. J.; Barlow, M. J. (1998). "Silicate and hydrocarbon emission from Galactic M supergiants". Monthly Notices of the Royal Astronomical Society 301 (4): 1083. doi:10.1046/j.1365-8711.1998.02078.x. edit
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