11 Librae

Star in the constellation Libra 11 Librae J2000 Libra 14 51 01.07273 −02 17 56.9488 4.93 red clump K0 III-IV 0.988 0.001 +83.60 0.06 +89.97 −124.57 14.92 0.40 0.80 1.10 0.22 10.32 0.60 59 15 12 2.42 0.09 4749 54 commas −0.32 0.09 3.74 0.48 5.05 2.67 11 Lib −01°2991 130952 72631 5535 140176 11+Lib 11 Librae is a single, fifth-magnitude star in the southern zodiac constellation of Libra. It is faintly visible to the naked eye with an apparent visual magnitude is 4.93. The star is moving further from the Sun with a heliocentric radial velocity of +83.6 km/s. The distance to this star, as estimated from its annual parallax shift of 14.92 0.40 mas, is about 219 light years. This star has a stellar classification of K0 III/IV, indicating the spectrum displays mixed traits of a giant/subgiant K-type star. Alves (2000) and Afşar et al. (2012) classify it as a red clump star, which means it is an evolved star at the cool end of the horizontal branch and is generating energy through helium fusion in its core region. It is about five billion years old and is spinning with a projected rotational velocity of 4 km/s. The star has 1.1 times the mass of the Sun and has expanded to over 10 times the Sun's radius. It is radiating around 59 times the Sun's radius from its enlarged photosphere at an effective temperature of about 4,749 K. References 11 Lib 2018-03-01 Validation of the new Hipparcos reduction van Leeuwen F. . Astronomy and Astrophysics 474 2 653–664 2007 0708.1752 2007A&A...474..653V 10.1051/0004-6361:20078357 18759600 Houk N. Swift C. Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars Michigan Spectral Survey 5 1999 1999MSS...C05....0H . XHIP: An extended hipparcos compilation Anderson E. Francis Ch. Astronomy Letters 38 5 331 2012 2012AstL...38..331A 10.1134/S1063773712050015 1108.4971 119257644 . 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 . K-Band Calibration of the Red Clump Luminosity Alves David R. . The Astrophysical Journal 539 2 732−741 August 2000 10.1086/309278 2000ApJ...539..732A astro-ph/0003329 16673121 Chemical Compositions of Thin-disk, High-metallicity Red Horizontal-branch Field Stars 1 Afşar M. Sneden C. For B. -Q. The Astronomical Journal . 144 1 20 20 July 2012 10.1088/0004-6256/144/1/20 2012AJ....144...20A 1205.3659 119249237 . Stellar parameters and chemical abundances of 223 evolved stars with and without planets Jofré E. Petrucci R. Saffe C. Saker L. de la Villarmois E. Artur Chavero C. Gómez M. Mauas P. J. D. Astronomy & Astrophysics 1 574 A50 46 February 2015 10.1051/0004-6361/201424474 2015A&A...574A..50J 1410.6422 53666931 Category:K0III stars Category:Horizontal-branch stars Category:Libra (constellation) Category:Durchmusterung objects Librae, 11 130952 072631 5535