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{{Stars of Aquila}} |
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[[Category:A-type subgiants]] |
[[Category:A-type subgiants]] |
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[[Category:Aquila (constellation)]] |
[[Category:Aquila (constellation)]] |
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Latest revision as of 20:03, 26 January 2026
Star in the constellation Aquila
Upsilon Aquilae is a star in the equatorial constellation of Aquila. Its name is a Bayer designation that is Latinized from υ Aquilae, and abbreviated Upsilon Aql or υ Aql. With an apparent visual magnitude of +5.91[5] it is a faint star but, according to the Bortle Dark-Sky Scale, it is visible to the naked eye from suburban skies. It has an annual parallax shift of 18.9 mas,[9] indicating a distance of 173 light-years (53 parsecs). The star is drifting closer with a radial velocity of −30 km/s.[6]
This is a subgiant star with a stellar classification of A3Â IV.[4] The outer atmosphere is radiating energy into space with 10.5[1] times the Sun’s luminosity from its photosphere at an effective temperature of 7,906Â K,[3] which gives it the white-hot glow of an A-type star. It is 361Â million years old with 1.68 times the mass of the Sun and has a relatively high rate of spin with a projected rotational velocity of 22.5Â km/s. An infrared excess has been reported, although no circumstellar disk has been resolved.[7]
- ^ a b c d Anderson, E.; Francis, Ch. (2012), “XHIP: An extended hipparcos compilation”, Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL…38..331A, doi:10.1134/S1063773712050015, S2CIDÂ 119257644.
- ^ a b c d Vallenari, A.; et al. (Gaia collaboration) (2023). “Gaia Data Release 3. Summary of the content and survey properties”. Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A…674A…1G. doi:10.1051/0004-6361/202243940. S2CID 244398875.
Gaia DR3 record for this source at VizieR. - ^ a b c d e Soubiran, C.; et al. (June 2010), “The PASTEL catalogue of stellar parameters”, Astronomy and Astrophysics, 515: A111, arXiv:1004.1069, Bibcode:2010A&A…515A.111S, doi:10.1051/0004-6361/201014247, S2CID 118362423.
- ^ a b Cowley, A.; et al. (April 1969), “A study of the bright A stars. I. A catalogue of spectral classifications”, Astronomical Journal, 74: 375–406, Bibcode:1969AJ…..74..375C, doi:10.1086/110819.
- ^ a b c Johnson, H. L.; et al. (1966), “UBVRIJKL photometry of the bright stars”, Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL…4…99J.
- ^ a b Wilson, Ralph Elmer (1953), “General catalogue of stellar radial velocities”, Washington, Carnegie Institution of Washington: 0, Bibcode:1953GCRV..C……0W.
- ^ a b c d Grandjean, A.; et al. (June 2021), “A SOPHIE RV search for giant planets around young nearby stars (YNS). A combination with the HARPS YNS survey”, Astronomy & Astrophysics, 650, id. A39, arXiv:2106.10754, Bibcode:2021A&A…650A..39G, doi:10.1051/0004-6361/202039672.
- ^ “* ups Aql”. SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-07-21.
- ^ 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.
