1 Lyncis

Red giant star in the constellation Lynx 1 Lyncis 250px A light curve for UW Lyncis, plotted from Hipparcos data J2000 06 17 54.81907 +61 30 55.0251 4.95 Lynx asymptotic giant branch M3IIIab +1.83 +1.96 Lb? +11.56 0.44 −10.59 0.36 −3.11 0.29 5.11 0.33 −1.44 156 2,848 3,485 UW Lyn 1 Lyn +61°869 2479 42973 29919 2215 13787 1+Lyn 1 Lyncis is a single star in the northern constellation of Lynx. It is also known by its variable star designation of UW Lyncis; 1 Lyncis is the Flamsteed designation. This object is visible to the naked eye as a faint, reddish-hued star with an apparent visual magnitude of 4.95. It is moving further from the Earth with a heliocentric radial velocity of 12 km/s. The star is an aging red giant of spectral type M3IIIab, currently on the asymptotic giant branch, having exhausted the hydrogen at its core and evolved away from the main sequence. It has been classified as a possible slow irregular variable,http://www.aavso.org/vsx/index.php?view=detail.top&oid=17932 UW Lyncis Watson, Christopher 4 January 2010 AAVSO Website American Association of Variable Star Observers 10 March 2016 after being found to be slightly variable in 1969 by Olin J. Eggen. Its changes in brightness are complex, with two shorter changeable periods of 35–40 and 47–50 days due to the star's pulsations, and a longer period of 1,500 days possibly due to the star's rotation or convectively induced oscillatory thermal (COT) mode. The star has expanded to 156 times the Sun's radius and it is radiating 2,848 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 3,485 K. References 30em van Leeuwen F. 2007 Validation of the new Hipparcos reduction Astronomy and Astrophysics 474 2 653–664 0708.1752 2007A&A...474..653V 10.1051/0004-6361:20078357 18759600 https://cdsarc.cds.unistra.fr/viz-bin/ftp-index?/ftp/cats/more/HIP/cdroms/cats Centre de Données astronomiques de Strasbourg /ftp/cats/more/HIP/cdroms/cats Strasbourg astronomical Data Center 15 October 2022 Light Variations of Small Amplitude in the Red Giants of the Disc Population Eggen, Olin J. Information Bulletin on Variable Stars 355, #1. (IBVS Homepage) 1969 355 1 1969IBVS..355....1E Percy, John R. Wilson, Joseph B. Henry, Gregory W. 2001 Long-Term VRI Photometry of Small-Amplitude Red Variables. I. Light Curves and Periods The Publications of the Astronomical Society of the Pacific 113 786 983–96 10.1086/322153 2001PASP..113..983P free 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 10.1111/j.1365-2966.2008.13596.x A catalogue of multiplicity among bright stellar systems 2008 Eggleton P. P. Tokovinin A. A. Monthly Notices of the Royal Astronomical Society 389 2 869 free 2008MNRAS.389..869E 0806.2878 14878976 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 1 Lyncis 9 March 2016 XHIP: An extended hipparcos compilation Anderson E. Francis Ch. Astronomy Letters 38 5 331 2012 2012AstL...38..331A 10.1134/S1063773712050015 1108.4971 119257644 1006142960066783616 Eggen Olin J. Asymptotic giant branch stars near the sun Astronomical Journal . 104 1 July 1992 275–313 10.1086/116239 1992AJ....104..275E Category:M-type giants Category:Asymptotic-giant-branch stars Category:Slow irregular variables Category:Lynx (constellation) BD+61 0869 Lyncis, 01 042973 029919 2215 Lyncis, UW