15 Ursae Majoris

Star in the constellation Ursa Major Ursa Major constellation map.svg center 280 right Red circle.svg 10 15 Ursae Majoris 885 432 Location of 15 Ursae Majoris (circled in red) J2000.0 Ursa Major 09 08 52.25763 +51 36 16.7330 4.46 main sequence kA3VmF5IIISr 0.288 0.013 −0.1 0.7 −136.33 −32.60 34.70 0.24 2.16 1.86 1.3 3.77 0.08 11.31 7519 98 commas 0.55 0.05 42 220 f UMa 15 UMa +52°1365 2721 3534 78209 44901 3619 27136 15+UMa 15 Ursae Majoris is a star in the northern circumpolar constellation Ursa Major, located 94 light-years away from the Sun. It has the Bayer designation f Ursae Majoris; 15 Ursae Majoris is the Flamsteed designation. It is visible to the naked eye as a white-hued star with an apparent visual magnitude of 4.46. 15 Ursae Majoris is a suspected member of the Castor stellar kinematic group, a 200-million-year-old association of co-moving stars. According to Eggleton and Tokovinin (2008), this is a suspected binary star system with an orbital period of 4.9 days and an eccentricity of 0.2. However, De Rosa et al. (2014) did not find a companion. The primary is metallic-lined (Am) star, meaning it has unusually strong absorption lines of metals in its spectrum. Classification of the spectrum is difficult due to the peculiarities. An MK classification of 15 UMa using the calcium K line is A3 V, but using metallic spectral lines it can appear as a cooler and more luminous star. Spectral lines in the blue region give a classification of F5 Ib, while in the violet region the lines suggest F5 III/IV. Nomenclature With τ, h, υ Ursae Majoris, φ, θ and e it composed the Arabic asterism Sarīr Banāt al-Na'sh, the Throne of the daughters of Na'sh, and Al-Haud, the Pond.Star-Names and Their Meanings Allen Richard Hinckley Richard Hinckley Allen 1899 G. E. Stechert New York 442 According to the catalogue of stars in the Technical Memorandum 33-507 - A Reduced Star Catalog Containing 537 Named Stars, Al-Haud were the title for seven stars: this star (f) as Alhaud I, τ as Alhaud II, e as Alhaud III, h as Alhaud IV, θ as Alhaud V, υ as Alhaud VI and φ as Alhaud VII.https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19720005197_1972005197.pdf Jack W. Rhoads Technical Memorandum 33-507-A Reduced Star Catalog Containing 537 Named Stars Jet Propulsion Laboratory, California Institute of Technology November 15, 1971 . In Chinese, zh 文昌 (zh-Latn Wén Chāng), meaning Administrative Center, refers to an asterism consisting six stars, such as 15 Ursae Majoris, υ Ursae Majoris, θ Ursae Majoris and φ Ursae Majoris.zh AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 6 月 16 日 https://web.archive.org/web/20120204114049/http://aeea.nmns.edu.tw/2006/0606/ap060616.html 2012-02-04 Ian Ridpath's Startales - Ursa Major the Great Bear References 15 UMa 2019-03-17 1016370651589755904 . XHIP: An extended hipparcos compilation Anderson E. Francis Ch. Astronomy Letters 1108.4971 38 5 331 2012 2012AstL...38..331A 10.1134/S1063773712050015 119257644 de Bruijne J. H. J. Eilers A.-C. Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project Astronomy & Astrophysics 546 A61 14 October 2012 10.1051/0004-6361/201219219 free 2012A&A...546A..61D 1208.3048 59451347 Nakajima Tadashi Morino Jun-Ichi Potential Members of Stellar Kinematic Groups within 30 pc of the Sun The Astronomical Journal 143 1 2 2012 2012AJ....143....2N 10.1088/0004-6256/143/1/2 free 1 Prugniel P. Vauglin I. Koleva M. The atmospheric parameters and spectral interpolator for the MILES stars Astronomy & Astrophysics 531 A165 2011 2011A&A...531A.165P 1104.4952 10.1051/0004-6361/201116769 free 54940439 Eggleton P. P. Tokovinin A. A. A catalogue of multiplicity among bright stellar systems Monthly Notices of the Royal Astronomical Society 389 2 869–879 2008 0806.2878 2008MNRAS.389..869E 10.1111/j.1365-2966.2008.13596.x free 14878976 Van Leeuwen F. Validation of the new Hipparcos reduction Astronomy and Astrophysics 474 2 653–664 2007 2007A&A...474..653V 0708.1752 10.1051/0004-6361:20078357 free 18759600 Sreedhar Rao S. Abhyankar K. D. MK morphological study of AM stars at 66 A/mm Journal of Astrophysics and Astronomy 12 2 133 1991 1991JApA...12..133S 10.1007/BF02709302 59324843 1 Royer F. Grenier S. Baylac M.-O. Gómez A. E. Zorec J. Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i Astronomy and Astrophysics 393 3 897–911 October 2002 10.1051/0004-6361:20020943 2002A&A...393..897R astro-ph/0205255 14070763 1 Pasinetti Fracassini L. E. Pastori L. Covino S. Pozzi A. Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) Third Astronomy and Astrophysics 367 521–524 February 2001 10.1051/0004-6361:20000451 2001A&A...367..521P astro-ph/0012289 425754 . 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. The VAST Survey - III. The multiplicity of A-type stars within 75 pc Monthly Notices of the Royal Astronomical Society 437 2 1216 2014 10.1093/mnras/stt1932 free 1311.7141 2014MNRAS.437.1216D 88503488 Category:A3V stars Category:Am stars Category:Ursa Major Ursae Majoris, f BD+52 1365 Ursae Majoris, 15 3534 078209 044901 3619 Alhaud I