Multiple star system in the constellation Aries
Pi Arietis , Latinized from π Arietis, is the Bayer designation for a multiple star system in the northern constellation of Aries . Based upon parallax measurements made during the Hipparcos mission, this system is approximately 800 light-years (250 parsecs ) distant from Earth and has an apparent visual magnitude of 5.21. This is bright enough to be faintly seen with the naked eye.
The primary member of this system is a massive, B-type main sequence star with a stellar classification of B6 V. It is a close spectroscopic binary with an orbital period of 3.854 days, an eccentricity of 0.04, and a combined visual magnitude of 5.30. At an angular separation of 3.28 arcseconds is a magnitude 8.46 A-type main sequence star with a classification of A0 Vp. Finally, a fourth member of the system is a magnitude 11.0 F-type main sequence star with a classification of F8V at an angular separation of 25.2 arcseconds from the primary.[ 3]
Name
This star, along with δ Ari , ε Ari , ζ Ari , and ρ3 Ari , were Al Bīrūnī's Al Buṭain (ألبطين ), the dual of Al Baṭn , the Belly.[ 8] Technical Memorandum 33-507 - A Reduced Star Catalog Containing 537 Named Stars , Al Buṭain were the title for five stars : δ Ari as Botein , π Ari as Al Buṭain I , ρ3 Ari as Al Buṭain II , ε Ari as Al Buṭain III dan ζ Ari as Al Buṭain IV .[ 9]
In Chinese , 左更 Zuǒ Gēng Official in Charge of the Forest ν Arietis , μ Arietis , ο Arietis and σ Arietis .[ 10] Chinese name for π Arietis itself is 左更五 Zuǒ Gēng wu the Fifth Star of Official in Charge of the Forest .)[ 11]
References
^ a b c d e van Leeuwen, F. (November 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 Crawford, D. L.; Barnes, J. V.; Golson, J. C. (1971), "Four-color, H-beta, and UBV photometry for bright B-type stars in the northern hemisphere", The Astronomical Journal , 76 : 1058, Bibcode :1971AJ.....76.1058C , doi :10.1086/111220 . ^ a b 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 . ^ Wilson, Ralph Elmer (1953), "General Catalogue of Stellar Radial Velocities", Carnegie Institute Washington D.C. Publication , Washington: Carnegie Institution of Washington, Bibcode :1953GCRV..C......0W . ^ a b 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 , S2CID 119257644 . ^ Abt, Helmut A.; Levato, Hugo; Grosso, Monica (July 2002), "Rotational Velocities of B Stars", The Astrophysical Journal , 573 (1): 359–365, Bibcode :2002ApJ...573..359A , doi :10.1086/340590 ^ "pi. Ari" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 2012-08-07 .^ Allen, R. H. (1963), Star Names: Their Lore and Meaning 83 , ISBN 0-486-21079-0 , retrieved 2010-12-12 .^ Rhoads, Jack W. (November 15, 1971), "Technical Memorandum 33-507-A Reduced Star Catalog Containing 537 Named Stars" (PDF) , Jet Propulsion Laboratory, California Institute of Technology . ^ (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) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 21 日 Archived 2011-05-22 at the Wayback Machine
External links
