DSS2 image of red supergiant star UY Scuti (brightest star in the image), surrounded by a dense starfield.
Observation data Epoch J2000 Equinox J2000
Constellation
Scutum
Right ascension
18h 27m 36.5334s[1]
Declination
−12° 27′ 58.866″[1]
Apparent magnitude (V)
8.29 - 10.56[2]
Characteristics
Evolutionary stage
Red supergiant[3]
Spectral type
M2-M4Ia-Iab[2]
U−B color index
+3.29[4]
B−V color index
+3.00[5]
Variable type
SRc[6]
Astrometry
Radial velocity (Rv)
18.33±0.82[7] km/s
Proper motion (μ)
RA: 1.3[8] mas/yr Dec.: −1.6[8] mas/yr
Parallax (π)
0.5166 ± 0.0494 mas[9]
Distance
5,871+534 −446[10] ly (1,800+164 −137[10] pc)
Absolute magnitude (MV)
−6.2[11]
Details
Radius
909[12]R☉
Luminosity
124,000[12]L☉
Temperature
3,550[12] K
Other designations
UY Sct, BD−12°5055, IRC −10422, RAFGL 2162, HV 3805
Database references
SIMBAD
data
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. It is considered to be one of the largest known stars, with a radius estimated at 909 solar radii (632 million kilometres; 4.23 astronomical units), thus a volume of 750 million times that of the Sun. This estimate implies if it were placed at the center of the Solar System, its photosphere would extend past the orbit of Mars or even the asteroid belt.
^ abHog, E.; Kuzmin, A.; Bastian, U.; Fabricius, C.; Kuimov, K.; Lindegren, L.; Makarov, V. V.; Roeser, S. (1998). "The TYCHO Reference Catalogue". Astronomy and Astrophysics. 335: L65. Bibcode:1998A&A...335L..65H.
^ ab"VSX: Detail for UY Sct". American Association of Variable Star Observers. Retrieved 2018-09-20.
^Cite error: The named reference tabernero was invoked but never defined (see the help page).
^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. arXiv:1305.6179. Bibcode:2013A&A...554A..76A. doi:10.1051/0004-6361/201220920. S2CID 73575062.
^Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237: 0. Bibcode:2002yCat.2237....0D.
^Cite error: The named reference gcvs was invoked but never defined (see the help page).
^Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
^ abHøg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5million brightest stars". Astronomy and Astrophysics. 355: L27. Bibcode:2000A&A...355L..27H. doi:10.1888/0333750888/2862. ISBN 978-0333750889.
^Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
^ abCite error: The named reference noiseless was invoked but never defined (see the help page).
^Lee, T. A. (1970). "Photometry of high-luminosity M-type stars". Astrophysical Journal. 162: 217. Bibcode:1970ApJ...162..217L. doi:10.1086/150648.
^ abcCite error: The named reference Healy2023 was invoked but never defined (see the help page).
UYScuti (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...
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structure and fundamental parameters of the red supergiants AH Scorpii, UYScuti, and KW Sagittarii". Astronomy and Astrophysics. 554: A76. arXiv:1305.6179...
structure and fundamental parameters of the red supergiants AH Scorpii, UYScuti, and KW Sagittarii". Astronomy and Astrophysics. 554: A76. arXiv:1305.6179...
structure and fundamental parameters of the red supergiants AH Scorpii, UYScuti, and KW Sagittarii". Astronomy & Astrophysics. 554: A76. arXiv:1305.6179...
and are hence also referred to as red hypergiants: NML Cygni S Persei UYScuti VY Canis Majoris Westerlund 1 W26 WOH G64 KY Cygni BI Cygni A survey expected...
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Sagittarii — another red supergiant (RSG) in the constellation Sagittarius UYScuti AH Scorpii Assuming that KW Sagittarii doesn't rotate. Van Leeuwen, F....
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The first dust formation episode in a Wolf-Rayet star was recorded on UYScuti soon after the telescope's first light in 1979. Red Buttes Observatory...
Retrieved 18 May 2014. Templeton, Matthew (16 July 2010). "Delta Scuti and the Delta Scuti Variables". Variable Star of the Season. AAVSO (American Association...
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