1 Lupi

Star in the constellation Lupus i Lupi (1 Lupi) iota Lupiι (iota) Lupi Lupus constellation map.svg center 250 right Red circle.svg 10 1 Lupi 528 295 Location of 1 Lupi (circled in red) J2000.0 Lupus 15 14 37.32104 -31 31 08.8434 4.90 F1 III or F0 Ib-II 0.37 +0.26 −22.80 −9.873 –0.892 1.8055 0.1876 −3.93 6.9 0.1 41.3 2.2 1.7 2,900 6,867 3.9 0.2 47.1 3.8 i Lup 1 Lup −31°11813 135153 74604 5660 206445 1+Lup 1 Lupi is a solitary giant star in the southern constellation of Lupus. It has the Bayer designation i Lupi; 1 Lupi is the Flamsteed designation. The apparent visual magnitude is 4.90, which indicates it is faintly visible to the naked eye. Based on parallax measurements, this star is approximately 1,800 light-years from the Sun. It is moving closer to the Earth with a heliocentric radial velocity of −23 km/s. Houk (1978) assigned the spectral classification of this star as F1III, which suggests it is an F-type (yellow-white) star that has evolved away from the main sequence and expanded into a giant. However, Gray et al. (2001) found a class of F0 Ib-II, matching a supergiant/bright giant star. It has a mass around seven times that of the Sun and has expanded to 41 times the Sun's radius. The star is radiating 2,900 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 6867 commas K. The estimated age of the star is around 47 million years. References 6210657748086115328 1 Gray R. O. Napier M. G. Winkler L. I. The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. I. Precise Spectral Types for 372 Stars The Astronomical Journal 121 4 2148–2158 April 2001 10.1086/319956 2001AJ....121.2148G . free i Lup -- Star SIMBAD Astronomical Database Centre de Données astronomiques de Strasbourg http://simbad.u-strasbg.fr/simbad/sim-id?Ident=1+Lupi 2016-03-07 . Houk N. Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars 2 1978 Dept. of Astronomy, University of Michigan 1978mcts.book.....H . Gontcharov G. A. Pulkovo Compilation of Radial Velocities for 35,495 Hipparcos stars in a common system Astronomy Letters 32 11 759–771 November 2006 10.1134/S1063773706110065 2006AstL...32..759G . 1606.08053 119231169 Ammler-von Eiff Matthias Reiners Ansgar New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars? Astronomy & Astrophysics 1204.2459 542 A116 June 2012 . 10.1051/0004-6361/201118724 2012A&A...542A.116A 53666672 Mermilliod J.-C. Compilation of Eggen's UBV data, transformed to UBV (unpublished) Catalogue of Eggen's UBV Data 1986 SIMBAD 1986EgUBV........0M . 1 McDonald I. Zijlstra A. A. Boyer M. L. Fundamental Parameters and Infrared Excesses of Hipparcos Stars Monthly Notices of the Royal Astronomical Society 427 1 343–57 2012 2012MNRAS.427..343M 1208.2037 10.1111/j.1365-2966.2012.21873.x free 118665352 . 1 Tetzlaff N. Neuhäuser R. Hohle M. M. A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun Monthly Notices of the Royal Astronomical Society 410 1 190–200 January 2011 10.1111/j.1365-2966.2010.17434.x free 2011MNRAS.410..190T 1007.4883 118629873 . 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 . XHIP: An extended hipparcos compilation Anderson E. Francis Ch. Astronomy Letters 38 5 331 2012 2012AstL...38..331A 10.1134/S1063773712050015 1108.4971 119257644 . Category:F-type giants Category:Lupus (constellation) Lupi, i Lupi, 1 CD-31 11813 135153 074604 5660