Star in the constellation Taurus
Delta3 Tauri (δ3 Tauri ) is a binary star [ 2] zodiac constellation of Taurus . Based upon an annual parallax shift of 21.96 mas as seen from Earth,[ 1] light years distant from the Sun . It is visible to the naked eye with a combined apparent visual magnitude of +4.32.[ 2] 3 Tauri is separated from δ1 Tauri by 0.72° on the sky.[ 10] Cleeia ,[ 11] [ 12] Greek Kleeia (transliteration of Κλεεια),[ 13] Hyades sisters . It is considered a member of the Hyades cluster .[ 5]
In Chinese , 畢宿 Bì Xiù Net 3 Tauri, ε Tauri , δ1 Tauri , γ Tauri , Aldebaran , 71 Tauri and λ Tauri .[ 14] Chinese name for δ3 Tauri itself is 畢宿二 Bì Xiù èr [ 15]
The magnitude 4.35[ 2] A-type star intermediate between main sequence and subgiant , with a stellar classification of A2 IV-Vs. The "s" indicates sharp (unusually narrow) absorption lines , a sign of slow rotation. It is a candidate blue straggler and shows characteristics of an Am star . Abt (1985) gave it a classification of A2kA3hA5m, indicating that the spectrum displays the calcium K-line of an A2 star, the hydrogen lines of an A3 star and the metal lines of an A5 star. It is deficient in scandium but has enhanced iron peak and heavy elements.[ 5] variability in the past,[ 16] 3 Tauri A was subsequently determined to be photometrically constant.[ 17]
The companion, component B, is a magnitude 8.37[ 2] angular separation of 1.80 arc seconds along a position angle of 341°, as of 2010. At 77 arcseconds away (as of 2006) is a magnitude 11.12 visual companion , designated component C.[ 18]
^ a b c d e f van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics , 474 (2): 653– 664, arXiv :0708.1752 Bibcode :2007A&A...474..653V , doi :10.1051/0004-6361:20078357 , S2CID 18759600 . ^ a b c d e 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 . ^ Gray, R. O.; Garrison, R. F. (1987), "The Early A-Type Stars: Refined MK Classification, Confrontation with Stroemgren Photometry, and the Effects of Rotation", The Astrophysical Journal Supplement Series , 65 : 581, Bibcode :1987ApJS...65..581G , doi :10.1086/191237 . ^ Eggen, Olin J. (July 1998), "The Age Range of Hyades Stars", The Astronomical Journal , 116 (1): 284– 292, Bibcode :1998AJ....116..284E , doi :10.1086/300413 ^ a b c d e f g Gebran, M.; Vick, M.; Monier, R.; Fossati, L. (November 2010), "Chemical composition of A and F dwarfs members of the Hyades open cluster", Astronomy and Astrophysics , 523 : 13, arXiv :1006.5284 Bibcode :2010A&A...523A..71G , doi :10.1051/0004-6361/200913273 , S2CID 7164596 , A71. ^ Stassun, Keivan G.; et al. (2019), "The Revised TESS Input Catalog and Candidate Target List", The Astronomical Journal , 158 (4): 138, arXiv :1905.10694 Bibcode :2019AJ....158..138S , doi :10.3847/1538-3881/ab3467 ^ Gáspár, András; Rieke, George H.; Ballering, Nicholas (2016), "The Correlation between Metallicity and Debris Disk Mass", The Astrophysical Journal , 826 (2): 171, arXiv :1604.07403 Bibcode :2016ApJ...826..171G , doi :10.3847/0004-637X/826/2/171 ^ Bychkov, V. D.; Bychkova, L. V.; Madej, J. (2005), "A catalog of stellar magnetic rotational phase curves", Astronomy and Astrophysics , 430 (3): 1143, Bibcode :2005A&A...430.1143B , doi :10.1051/0004-6361:20034563 . ^ De Rosa, R. J.; Patience, J.; Wilson, P. A.; Schneider, A.; Wiktorowicz, S. J.; Vigan, A.; Marois, C.; Song, I.; MacIntosh, B.; Graham, J. R.; Doyon, R.; Bessell, M. S.; Thomas, S.; Lai, O. (2014), "The VAST Survey - III. The multiplicity of A-type stars within 75 pc", Monthly Notices of the Royal Astronomical Society , 437 (2): 1216, arXiv :1311.7141 Bibcode :2014MNRAS.437.1216D , doi :10.1093/mnras/stt1932 ^ a b "del03 Tau" , SIMBAD Centre de données astronomiques de Strasbourg , retrieved 2017-08-07 .^ Falkner, David E. (2011), The Mythology of the Night Sky: An Amateur Astronomer's Guide to the Ancient Greek and Roman Legends Springer Science & Business Media , p. 36, ISBN 978-1461401377 ^ Bagnall, Philip M. (2012), The Star Atlas Companion: What you need to know about the Constellations Bibcode :2012sacw.book.....B , ISBN 978-1461408307 ^ "Family of the Hyades" , Theoi Greek Mythology , retrieved 2017-08-08 .^ (in Chinese) 中國星座神話 , written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7 ^ (in Chinese) 香港太空館 - 研究資源 - 亮星中英對照表 Archived 2008-10-25 at the Wayback Machine , Hong Kong Space Museum. Accessed on line November 23, 2010.^ Kholopov, P. N.; et al. (February 1981), "65th Name-List of Variable Stars", Information Bulletin on Variable Stars , 1921 : 1, Bibcode :1981IBVS.1921....1K . ^ Adelman, S. J. (June 1997), "On the possible variability of metallic-line and Mercury-Manganese stars", Astronomy & Astrophysics Supplement Series , 123 (3): 445– 447, Bibcode :1997A&AS..123..445A , doi :10.1051/aas:1997167 ^ Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal , 122 (6): 3466– 3471, Bibcode :2001AJ....122.3466M , doi :10.1086/323920
