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Star in the constellation Andromeda
Tau Andromedae , Latinized from τ Andromedae, is the Bayer designation for a single[ 9] star in the northern constellation of Andromeda . It has an apparent visual magnitude of +4.94,[ 2] bright enough to be viewed from dark suburban skies. From parallax measurements made during the Gaia mission, the distance to this star can be estimated as roughly 680 light-years (210 parsecs ) from Earth. The brightness of this star is diminished by 0.24 in magnitude due to extinction caused by intervening gas and dust.[ 3] radial velocity of −14 km/s.[ 4]
The spectrum of this star matches a stellar classification of B5 III,[ 3] luminosity class of III indicating that this is a giant star . It is radiating about 851 times the luminosity of the Sun[ 5] photosphere at an effective temperature of 12,670 K.[ 6] [ 7] projected rotational velocity of ~74 km/s.[ 6]
In Chinese , 天大將軍 Tiān Dà Jiāng Jūn Heaven's Great General γ Andromedae , φ Persei , 51 Andromedae , 49 Andromedae , χ Andromedae , υ Andromedae , 56 Andromedae , β Trianguli , γ Trianguli and δ Trianguli . Consequently, the Chinese name for τ Andromedae itself is 天大將軍七 Tiān Dà Jiāng Jūn qī the Seventh Star of Heaven's Great General .).[ 10]
^ a b c d e 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 .^ a b c d 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 c van Belle, Gerard T.; von Braun, Kaspar (April 2009), "Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars", The Astrophysical Journal , 694 (2): 1085–1098, arXiv :0901.1206 Bibcode :2009ApJ...694.1085V , doi :10.1088/0004-637X/694/2/1085 , S2CID 18370219 . ^ a b Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system", Astronomy Letters , 32 (11): 759–771, arXiv :1606.08053 Bibcode :2006AstL...32..759G , doi :10.1134/S1063773706110065 , S2CID 119231169 . ^ a b van Belle, G. T.; et al. (May 2008), "The Palomar Testbed Interferometer Calibrator Catalog", The Astrophysical Journal Supplement Series , 176 (1): 276–292, arXiv :0711.4194 Bibcode :2008ApJS..176..276V , doi :10.1086/526548 , S2CID 10713221 . ^ a b c d e Huang, Wenjin; et al. (October 2010), "A Stellar Rotation Census of B Stars: From ZAMS to TAMS", Astrophysical Journal , 722 (1): 605–619, arXiv :1008.1761 Bibcode :2010ApJ...722..605H , doi :10.1088/0004-637X/722/1/605 , ISSN 0004-637X , S2CID 118532653 . ^ a b Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters , 38 (11): 694–706, arXiv :1606.09028 Bibcode :2012AstL...38..694G , doi :10.1134/S1063773712110035 , S2CID 119108982 . ^ "* tau And" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 2012-06-24 .^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, arXiv :0806.2878 Bibcode :2008MNRAS.389..869E , doi :10.1111/j.1365-2966.2008.13596.x S2CID 14878976 . ^ (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 10 日
