16 Virginis

Star in the constellation Virgo Virgo constellation map.svg center 280 right Red circle.svg 10 16 Virginis 718 382 Location of 16 Virginis (circled in red) J2000.0 J2000.0 (ICRS) Virgo 12 20 20.98133 +03 18 45.2604 4.96 red clump K0.5 IIIb Fe−0.5 1.16 +36.66 0.17 −292.95 −63.58 10.59 0.25 +0.10 1.62 19.3 131.8 4423 32 commas 1.77 −0.38 4.2 3.22 c Vir 16 Vir +04°2604 107328 60172 4695 119341 5558 c+Vir 16 Virginis is a single star in the zodiac constellation of Virgo, located about 308 light years from the Sun. It has the Bayer designation c Virginis; 16 Virginis is the Flamsteed designation. This object is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.96. This is an IAU radial velocity standard star; it is moving further from the Earth with a heliocentric radial velocity of +37 km/s. The star has a relatively high proper motion, traversing the celestial sphere at an angular rate of 0.301 arcsecond per year. In Chinese astronomy, 16 Virginis is called 謁者, Pinyin: Yèzhě, meaning Usher to the Court, because this star is marking itself and stand alone in Usher to the Court asterism, Supreme Palace enclosure mansion (see: Chinese constellation). This is an evolved K-type giant star with a stellar classification of K0.5 IIIb Fe−0.5, where the suffix notation denotes a mild under-abundance of iron in the spectrum. It is a red clump giant, which indicates is on the horizontal branch generating energy via helium fusion at its core. The interferometry-measured angular diameter of this star, after correcting for limb darkening, is 1.74 0.02 mas, while the physical radius is about 19 times the radius of the Sun. It is about three billion years old with 1.62 times the mass of the Sun and is radiating 132 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,423 K. References c Vir 2019-02-10 3793247534517512064 60172 Soubiran C. Creevey O. L. Lagarde N. Brouillet N. Jofré P. Casamiquela L. Heiter U. Aguilera-Gómez C. Vitali S. Worley C. De Brito Silva D. Gaia FGK benchmark stars: Fundamental Teff and log g of the third version Astronomy and Astrophysics 2024 682 A145 10.1051/0004-6361/202347136 free 2310.11302 2024A&A...682A.145S Perdelwitz V. Trifonov T. Teklu J. T. Sreenivas K. R. Tal-Or L. Analysis of the public HARPS/ESO spectroscopic archive. Ca II H&K time series for the HARPS radial velocity database Astronomy and Astrophysics 2024 683 10.1051/0004-6361/202348263 free 2311.12438 2024A&A...683A.125P 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 September 2008 10.1111/j.1365-2966.2008.13596.x free 2008MNRAS.389..869E 0806.2878 14878976 . van Leeuwen F. Validation of the new Hipparcos reduction Astronomy and Astrophysics 474 2 653–664 2007 0708.1752 2007A&A...474..653V 10.1051/0004-6361:20078357 18759600 . Keenan Philip C. McNeil Raymond C. The Perkins catalog of revised MK types for the cooler stars Astrophysical Journal Supplement Series 71 245 1989 . 1989ApJS...71..245K 10.1086/191373 Abundances in the Local Region. I. G and K Giants Luck R. Earle Astronomical Journal 150 3 88 2015 1507.01466 2015AJ....150...88L 10.1088/0004-6256/150/3/88 118505114 . http://www.ianridpath.com/startales/virgo.htm Ian Ridpath Startales Virgo the Virgin . Wavelength Standards for the Measurement of Radial Velocities Batten A. H. Crampton D. Fletcher J. M. Morbey C. L. Publications of the Dominion Astrophysical Observatory 13 441 1971 1971PDAO...13..441B . Richichi A. Percheron I. Khristoforova M. CHARM2: An updated Catalog of High Angular Resolution Measurements Astronomy and Astrophysics . 431 2 773–777 February 2005 10.1051/0004-6361:20042039 2005A&A...431..773R free Alves David R. K-Band Calibration of the Red Clump Luminosity The Astrophysical Journal 539 2 732–741 August 2000 10.1086/309278 2000ApJ...539..732A astro-ph/0003329 16673121 . Lépine Sébastien Shara Michael M. A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog) The Astronomical Journal 129 3 1483–1522 March 2005 10.1086/427854 2005AJ....129.1483L astro-ph/0412070 2603568 . Category:K-type giants Horizontal-branch stars Category:Suspected variables Category:Virgo (constellation) Virginis, c BD+04 2604 Virginis, 016 107328 060172 4695 Category:Horizontal-branch stars