Star in the constellation Virgo
69 Virginis is a single[ 10] star in thezodiac constellation ofVirgo , located about 259 light years away. It is visible to the naked eye as a faint orange-hued star with anapparent visual magnitude of 4.76,[ 2] variable that may range in magnitude from 4.75 down to 4.79.[ 11] radial velocity of −13 km/s.[ 5] polarized due to interveninginterstellar dust .[ 12]
This is anevolved K-type giant star with astellar classification ofK0 III-IIIb CN1.5 CH0.5 ,[ 3] spectrum . It is ared clump giant, which indicates is on thehorizontal branch generating energy viahelium fusion at its core.[ 13] [ 6] mass of the Sun and 15[ 7] Sun's radius . It is radiating 87[ 7] Sun's luminosity from its enlargedphotosphere at aneffective temperature of 4,909 K.[ 6]
^a b c d e Brown, A. G. A. ; et al. (Gaia collaboration ) (August 2018)."Gaia Data Release 2: Summary of the contents and survey properties" .Astronomy & Astrophysics 616 . A1.arXiv :1804.09365 Bibcode :2018A&A...616A...1G doi :10.1051/0004-6361/201833051 Gaia DR2 record for this source atVizieR .^a b c 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 . ^a b Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars",Astrophysical Journal Supplement Series ,71 : 245,Bibcode :1989ApJS...71..245K ,doi :10.1086/191373 . ^a b Hoffleit, Dorrit; Jaschek, Carlos (1991), "The Bright star catalogue",New Haven ,Bibcode :1991bsc..book.....H ^a b de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project",Astronomy & Astrophysics ,546 : 14,arXiv :1208.3048 Bibcode :2012A&A...546A..61D ,doi :10.1051/0004-6361/201219219 ,S2CID 59451347 , A61. ^a b c Feuillet, Diane K.; et al. (2016), "Determining Ages of APOGEE Giants with Known Distances",The Astrophysical Journal ,817 (1): 40,arXiv :1511.04088 Bibcode :2016ApJ...817...40F ,doi :10.3847/0004-637x/817/1/40 S2CID 118675933 . ^a b c d e Massarotti, Alessandro; et al. (January 2008), "Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity",The Astronomical Journal ,135 (1):209– 231,Bibcode :2008AJ....135..209M ,doi :10.1088/0004-6256/135/1/209 S2CID 121883397 . ^ Meléndez, J.; et al. (June 2008), "Chemical similarities between Galactic bulge and local thick disk red giant stars",Astronomy and Astrophysics ,484 (3):L21 – L25 ,arXiv :0804.4124 Bibcode :2008A&A...484L..21M ,doi :10.1051/0004-6361:200809398 ,S2CID 3201679 . ^ "69 Vir" .SIMBAD Centre de données astronomiques de Strasbourg . Retrieved2019-02-10 .^ 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 . ^ Samus, N. N.; et al. (2017), "General Catalogue of Variable Stars",Astronomy Reports , 5.1,61 (1):80– 88,Bibcode :2017ARep...61...80S ,doi :10.1134/s1063772917010085 ,S2CID 125853869 . ^ Leroy, J. L. (July 1993), "A Polarimetric Investigation on Interstellar Dust Within 50-PARSECS from the Sun",Astronomy and Astrophysics ,274 (1): 203,Bibcode :1993A&A...274..203L . ^ Alves, David R. (August 2000), "K-Band Calibration of the Red Clump Luminosity",The Astrophysical Journal ,539 (2):732– 741,arXiv :astro-ph/0003329 Bibcode :2000ApJ...539..732A ,doi :10.1086/309278 ,S2CID 16673121 .
