1 Lacertae

Star in the constellation Lacerta Lacerta constellation map.svg center 250 right Red circle.svg 10 1 Lac 60.3 72.9 Location of 1 Lacertae (circled) J2000.0 Lacerta 22 15 58.17690 +37 44 55.4468 4.15 horizontal branch K3 II-III +1.43 +1.70 −8.58 +8.851 –0.089 4.8108 0.1322 −2.61 0.27 0.24 4.16 0.28 69.01 3.32 3.07 1453 147 commas 2.15 4288 62 commas −0.01 10 170 30 NSV 25864 1 Lac +37°4526 211388 109937 8498 72191 1+Lac thumb|left|1 Lacertae in optical light 1 Lacertae is a solitary star in the northern constellation of Lacerta. It is visible to the naked eye with an apparent visual magnitude of 4.15. Based upon measurements by the Hipparcos spacecraft, this star is located at a distance of roughly 680 light years. It is moving closer to the Earth with a heliocentric radial velocity of −8.6 km/s. A stellar classification of K3 II-III suggests this is an evolved star with a luminosity class intermediate between a giant and bright giant. It is 170 million years old with around four times the mass of the Sun and has expanded to an estimated 69 times the Sun's radius. The star is radiating 1,453 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,288 K, giving it the orange-hued glow of a K-type star. The star was once a suspected variable, but this was later rescinded. References 1907131544341497600 1 Samus N. N. Kazarovets E. V. Durlevich O. V. Kireeva N. N. Pastukhova E. N. General Catalogue of Variable Stars 5.1 Astronomy Reports 2017 61 1 80–88 10.1134/S1063772917010085 http://www.sai.msu.su/gcvs/gcvs/ 2019-01-27 2017ARep...61...80S 125853869 . subscription 1 Lac -- Variable Star SIMBAD Astronomical Database Centre de Données astronomiques de Strasbourg http://simbad.u-strasbg.fr/simbad/sim-id?Ident=1+Lacertae 2016-03-07 . Herbig George H. Spalding John F. Jr. Axial Rotation and Line Broadening in Stars of Spectral Types F0-K5 Astrophysical Journal 121 118 January 1955 10.1086/145969 1955ApJ...121..118H . Bernacca P. L. Perinotto M. A catalogue of stellar rotational velocities Contributi Osservatorio Astronomico di Padova in Asiago 1970 239 1 1970CoAsi.239....1B Mermilliod J.-C. Compilation of Eggen's UBV data, transformed to UBV (unpublished) Catalogue of Eggen's UBV Data SIMBAD 1986 1986EgUBV........0M . 1 Famaey B. Jorissen A. Luri X. Mayor M. Udry S. Dejonghe H. Turon C. Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters Astronomy and Astrophysics 430 165–186 2005 10.1051/0004-6361:20041272 2005A&A...430..165F . astro-ph/0409579 17804304 A catalogue of multiplicity among bright stellar systems Eggleton P. P. Tokovinin A. A. Monthly Notices of the Royal Astronomical Society 389 2 869 2008 10.1111/j.1365-2966.2008.13596.x free 2008MNRAS.389..869E . 0806.2878 14878976 1 Carney Bruce W. Gray David F. Yong David Latham David W. Manset Nadine Zelman Rachel Laird John B. Rotation and Macroturbulence in Metal-Poor Field Red Giant and Red Horizontal Branch Stars The Astronomical Journal 135 3 892–906 March 2008 10.1088/0004-6256/135/3/892 2008AJ....135..892C 0711.4984 2756572 . The Colour of Stars December 21, 2004 Australia Telescope, Outreach and Education Commonwealth Scientific and Industrial Research Organisation http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html 2012-01-16 . https://web.archive.org/web/20120318151427/http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html March 18, 2012 Fundamental Parameters of 87 Stars from the Navy Precision Optical Interferometer Baines E. Schmitt H. R. Zavala R. T. Hutter D. van Belle G. T. The Astronomical Journal 155 1 30 2017 2018AJ....155...30B 10.3847/1538-3881/aa9d8b 1712.08109 119427037 free Precise radial velocities of giant stars. X. Bayesian stellar parameters and evolutionary stages for 372 giant stars from the Lick planet search 1 Stock Stephan Reffert Sabine Quirrenbach Andreas Astronomy & Astrophysics 616 A33 15 August 2018 10.1051/0004-6361/201833111 2018A&A...616A..33S 1805.04094 119361866 Category:K-type giants Category:K-type bright giants Category:Lacerta BD+37 4526 Lacertae, 01 211388 109937 8498 Category:Horizontal-branch stars Category:K3 stars