19 Arietis

Star in the constellation Aries J2000 02 13 03.30440 +15 16 47.5005 5.70 Aries AGB M0 III 0.97 +1.55 +1.95 Semiregular 21.11 ± 0.26 +97.95 −20.30 6.81 0.38 39.36 301.969 commas 3838 125 −0.02 0.11 BD+14 357, FK5 1057, HD 13596, HIP 10328, HR 648, SAO 92841. 19+Ari 19 Arietis (abbreviated 19 Ari) is a star in the northern constellation of Aries. 19 Arietis is the Flamsteed designation. It has an apparent visual magnitude of 5.70, which means it is faintly visible to the naked eye. Based upon an annual parallax shift of 6.81 mas, it is approximately 480 ly pc off on away from Earth. At that distance, the brightness of the star is diminished by 0.21 in magnitude from extinction caused by interstellar gas and dust. This is a red giant star with a stellar classification of M0 III. It is a semi-regular variable with periods of 32 and 275 days; the brightness of the star changes by an amplitude of 0.14 in magnitude during those intervals. 19 Arietis has expanded to 39 times the size of the Sun, its photosphere radiates 300 times the luminosity of the Sun. The effective temperature of the outer envelope is 3,838 K, giving it the cool reddish glow of an M-type star. References F. van Leeuwen November 2007 Validation of the new Hipparcos reduction Astronomy and Astrophysics 474 2 653–664 2007A&A...474..653V 10.1051/0004-6361:20078357 0708.1752 18759600 . 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 1 165–186 January 2005 10.1051/0004-6361:20041272 2005A&A...430..165F astro-ph/0409579 17804304 . 1 Johnson H. L. Iriarte B. Mitchell R. I. Wisniewskj W. Z. UBVRIJKL photometry of the bright stars Communications of the Lunar and Planetary Laboratory 4 99 1966 99 1966CoLPL...4...99J . 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 10.1111/j.1365-2966.2008.13596.x 2008MNRAS.389..869E 0806.2878 . September 2008 free 14878976 Yeşilyaprak C. Aslan Z. Period-luminosity relation for M-type semiregular variables from Hipparcos parallaxes Monthly Notices of the Royal Astronomical Society 355 2 601–607 10.1111/j.1365-2966.2004.08344.x 2004MNRAS.355..601Y 0704.3150 . 2007 free 19 Ari 2012-07-18 Taylor B. J. Catalogs of temperatures and [Fe/H] averages for evolved G and K stars Astronomy and Astrophysics Supplement 134 523–524 10.1051/aas:1999153 1999A&AS..134..523T . February 1999 3 free McDonald I. Zijlstra A. A. Watson R. A. 2017-10-01 Fundamental parameters and infrared excesses of Tycho-Gaia stars Monthly Notices of the Royal Astronomical Society 471 770–791 10.1093/mnras/stx1433 free 0035-8711 1706.02208 2017MNRAS.471..770M 19 Arietis' database entry at VizieR. 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 dead https://web.archive.org/web/20120318151427/http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html March 18, 2012 Eggen Olin J. Asymptotic Giant Branch Stars Near the Sun The Astronomical Journal 1992 104 275 10.1086/116239 1992AJ....104..275E External links HR 648 Image 19 Arietis 013596 010328 Arietis, 19 Category:Aries (constellation) Category:M0III stars Category:Durchmusterung objects 0648 Category:Suspected variables Category:Asymptotic-giant-branch stars