16 Librae

Star in the constellation Libra Libra IAU.svg center 280 right Red circle.svg 10 16 Librae 608 242 Location of 16 Librae (circled in red) J2000 Libra 14 57 11.00009 -04 20 47.2547 4.49 F2 V +0.32 +0.05 +26.3 0.6 −96.98 −153.40 37.17 0.32 2.32 16 Lib A 1.47 9.77 3.99 −0.13 7187 244 commas 113.3 660 16 Lib −03°3696 3177 9503 132052 73165 5570 140240 J14572-0421A 16 Lib 2018-01-30 16+Lib 16 Librae is a star in the constellation Libra. It is a faint star but visible to the naked eye with an apparent visual magnitude of 4.49. An annual parallax shift of 37.17 mas yields a distance estimate of 87.7 light years. It is moving further from the Sun with a radial velocity of +26 km/s. This is an ordinary F-type main-sequence star with a stellar classification of F2 V. It is an estimated 660 million years old and is spinning rapidly with a projected rotational velocity of 113 km/s. The star has 1.47 times the mass of the Sun and is radiating nearly 10 times the Sun's luminosity from its photosphere at an effective temperature of about 7,187 K. 16 Librae has a common proper motion companion located at an angular separation of 22.8 arc seconds along a position angle of 297°, as of 1999. Designated component B, this is a red dwarf star with a class of about M6 and an infrared J-band magnitude of 12.19. References F. van Leeuwen Validation of the new Hipparcos reduction Astronomy and Astrophysics 474 2 653–664 November 2007 2007A&A...474..653V 10.1051/0004-6361:20078357 0708.1752 18759600 . XHIP: An extended hipparcos compilation Anderson E. Francis Ch. Astronomy Letters 38 5 331 2012 2012AstL...38..331A 10.1134/S1063773712050015 1108.4971 119257644 . VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system CDS/ADC Collection of Electronic Catalogues Ducati J. R. 2237 2002 . 2002yCat.2237....0D 1 Casagrande L. Schönrich R. Asplund M. Cassisi S. Ramírez I. Meléndez J. Bensby T. Feltzing S. New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey Astronomy and Astrophysics 530 A138 June 2011 10.1051/0004-6361/201016276 2011A&A...530A.138C 1103.4651 56118016 . 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 2012A&A...546A..61D 1208.3048 59451347 . David Trevor J. Hillenbrand Lynne A. The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets The Astrophysical Journal 804 2 146 2015 2015ApJ...804..146D 10.1088/0004-637X/804/2/146 1501.03154 33401607 . Overlooked wide companions of nearby F stars Scholz R. -D. Astronomy & Astrophysics 1601.01896 587 A51 8 March 2016 10.1051/0004-6361/201527965 2016A&A...587A..51S 118348424 Houk N. Swift C. Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars Michigan Spectral Survey 5 1999 1999MSS...C05....0H . Schröder C. Reiners Ansgar Schmitt Jürgen H. M. M. Ca II HK emission in rapidly rotating stars. Evidence for an onset of the solar-type dynamo Astronomy and Astrophysics 493 3 1099–1107 January 2009 10.1051/0004-6361:200810377 2009A&A...493.1099S free http://goedoc.uni-goettingen.de/goescholar/bitstream/handle/1/9690/aa10377-08.pdf?sequence=2 2018-11-04 2017-09-22 https://web.archive.org/web/20170922162905/https://goedoc.uni-goettingen.de/bitstream/handle/1/9690/aa10377-08.pdf?sequence=2 dead Category:F2V stars Category:Libra (constellation) Librae, 16 BD-03 3696 9503 132052 073165 5570