| 词条 | Xi Virginis |
| 释义 |
| name = ξ Virginis }}{{Starbox image | image={{Location mark |image=Virgo constellation map.svg|alt=|float=center|width=280 |label=|position=right |mark=Red circle.svg|mark_width=8|mark_link=ξ Vir |x=910|y=268 }} |caption=Location of ξ Virginis (circled) }}{{Starbox observe | epoch = J2000.0 | constell = Virgo | ra = {{RA|11|45|17.04027}} | dec = {{DEC|+08|15|29.2150}} | appmag_v = 4.83[3] }}{{Starbox character | class = A4 V[4] | b-v = +0.17[3] | u-b = +0.10[3] | variable = }}{{Starbox astrometry | radial_v = −0.5[7] | prop_mo_ra = +60.08 | prop_mo_dec = −24.50 | parallax = 26.73 | p_error = 0.25 | parallax_footnote = | absmag_v = +1.98[11] }}{{Starbox detail | mass = 1.93[12] | radius = 1.5[13] | luminosity = 12.6[14] | gravity = 4.31[12] | temperature = 8,172[14] | metal_fe = | rotational_velocity = 130[4] | age_myr = 480[18] }}{{Starbox catalog | names = 2 Virginis, ξ Vir, BD+09°2545, HD 102124, HIP 57328, HR 4515, SAO 119029[19] }}{{Starbox reference | Simbad = ksi+Vir }}{{Starbox end}}Xi Virginis (ξ Vir, ξ Virginis) is a solitary[20] star in the zodiac constellation of Virgo. It is bright enough to be seen with the naked eye, having an apparent visual magnitude of 4.83.[3] The distance to this star is about 122 light years, as determined from parallax readings. Xi Virginis is an A-type main sequence star with a stellar classification of A4 V.[4] It has an estimated age of 480[18] million years and is spinning rapidly with a projected rotational velocity of 130 km/s.[4] It has about 150%[13] the Sun's radius and shines with 12.6[14] times the luminosity of the Sun. References1. ^1 2 {{citation | last1=David | first1=Trevor J. | last2=Hillenbrand | first2=Lynne A. | title=The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets | journal=The Astrophysical Journal | volume=804 | issue=2 | pages=146 | year=2015 | bibcode=2015ApJ...804..146D | doi=10.1088/0004-637X/804/2/146 | arxiv=1501.03154 | postscript=. }} [1][2][3][4][5][6][7][8][9][10]2. ^1 2 3 4 {{citation | last1=Abt | first1=Helmut A. | last2=Morrell | first2=Nidia I. | title=The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars | journal=Astrophysical Journal Supplement | volume=99 | page=135 | date=July 1995 | doi=10.1086/192182 | bibcode=1995ApJS...99..135A | postscript=. }} 3. ^1 {{citation | last=Wilson | first=R. E. | year=1953 | title=General Catalogue of Stellar Radial Velocities | journal=Carnegie Institute Washington D.c. Publication | bibcode=1953GCRV..C......0W | postscript=. }} 4. ^1 2 {{citation | last1=Vican | first1=Laura | title=Age Determination for 346 Nearby Stars in the Herschel DEBRIS Survey | journal=The Astronomical Journal | volume=143 | issue=6 | page=135 |date=June 2012 | doi=10.1088/0004-6256/143/6/135 | bibcode=2012AJ....143..135V | arxiv=1203.1966 | postscript=. }} 5. ^1 2 {{citation | display-authors=1 | last1=Pasinetti Fracassini | first1=L. E. | last2=Pastori | first2=L. | last3=Covino | first3=S. | last4=Pozzi | first4=A. | title=Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics | journal=Astronomy & Astrophysics | volume=367 | issue=2 | pages=521–24 | date=2001 | bibcode=2001A&A...367..521P | doi=10.1051/0004-6361:20000451 | arxiv=astro-ph/0012289 | postscript=. }} 6. ^1 2 3 {{citation | display-authors=1 | last1=McDonald | first1=I. | last2=Zijlstra | first2=A. A. | last3=Boyer | first3=M. L. | title=Fundamental Parameters and Infrared Excesses of Hipparcos Stars | journal=Monthly Notices of the Royal Astronomical Society | volume=427 | issue=1 | pages=343–57 | date=2012 | bibcode=2012MNRAS.427..343M | arxiv=1208.2037 | doi=10.1111/j.1365-2966.2012.21873.x | postscript=. }} 7. ^1 {{citation | title=XHIP: An extended hipparcos compilation | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | journal=Astronomy Letters | volume=38 | issue=5 | pages=331 | year=2012 | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | arxiv=1108.4971 | postscript=. }} 8. ^1 2 3 4 {{citation | last1=Mermilliod | first1=J.-C. | title=Compilation of Eggen's UBV data, transformed to UBV (unpublished) | journal=Catalogue of Eggen's UBV Data. SIMBAD | date=1986 | bibcode=1986EgUBV........0M | postscript=. }} 9. ^1 {{citation | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869–879 | date=September 2008 | doi=10.1111/j.1365-2966.2008.13596.x | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | postscript=. }} 10. ^1 {{citation | title=ksi Vir -- Star | work=SIMBAD Astronomical Database | publisher=Centre de Données astronomiques de Strasbourg | url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=ksi+vir | accessdate=2016-09-08 | postscript=. }} }}{{Virgo|state=collapsed}} 8 : Bayer objects|Virgo (constellation)|A-type main-sequence stars|Flamsteed objects|Hipparcos objects|HR objects|Henry Draper Catalogue objects|Durchmusterung objects |
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