15 Eridani

Star in the constellation Eridanus Eridanus constellation map.svg center 260 right Red circle.svg 10 15 Eridani 624 474 Location of 15 Eridani (circled in red) J2000 Eridanus 03 18 22.10504Validation of the new Hipparcos reduction van Leeuwen, F. etal Astronomy and Astrophysics 474 2 653–664 2007 0708.1752 2007A&A...474..653V 10.1051/0004-6361:20078357 free 18759600 -22 30 40.0191 4.875The Tycho-2 catalogue of the 2.5 million brightest stars Høg, E. etal 2000 Astronomy and Astrophysics 355 L27–L30 2000A&A...355L..27H(6.57 / 5.32) red clump K0III1988mcts.book.....H Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. Volume 4, Declinations -26°.0 to -12°.0. Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars 4 Houk, N. Smith-Moore, M. 1988 +0.90UBVRIJKL Photometry of the Bright Stars Johnson, H. L. Communications of the Lunar and Planetary Laboratory 4 99 1966 1966CoLPL...4...99J 23.90 0.5Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ~55000 stars and mean radial velocities of 516 Galactic open clusters and associations Kharchenko, N. V. etal Astronomische Nachrichten 328 9 889 2007 2007AN....328..889K 10.1002/asna.200710776 0705.0878 119323941 13.08 13.33 12.77 1.17 +0.85Ammler-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 http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/wds/orb6 Sixth Catalog of Orbits of Visual Binary Stars United States Naval Observatory 11 August 2017 1 August 2017 https://web.archive.org/web/20170801102553/http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/wds/orb6 dead 118.16 0.340 66.6 271.6 1934.24 0.030 333.5 15 Eri A 2.32Abundances in the Local Region. I. G and K Giants Luck R. Earle Astronomical Journal 150 3 88 2015 1507.01466 2015AJ....150...88L 10.1088/0004-6256/150/3/88 118505114 4960 31 commas 72.4 4.5 0.2 1.44 15 Eri −22°1146 20610 15382 994 168452 J03184-2231 15+Eri 15 Eridani is a binary star system in the equatorial constellation of Eridanus. It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.875. Based upon parallax measurements, the system is located around 260 light years away from the Sun. It is moving further from the Earth with a heliocentric radial velocity of 24 km/s. This system has an orbital period of 118.16 years with an eccentricity of 0.030 and a semimajor axis of 0.340 arcsecond. The primary member, designated component A, is a magnitude 5.32Eggleton 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 giant star with a stellar classification of K0 III. It is a red clump giant,Alves David R. K-Band Calibration of the Red Clump Luminosity The Astrophysical Journal 539 2 732–741 August 2000 10.1086/309278 2000ApJ...539..732A astro-ph/0003329 16673121 which means it is on the horizontal branch and is generating energy through helium fusion at its core. This star has 1.44 billion years old with 2.32 times the mass of the Sun. It is radiating 72.4 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,960 K. The companion, component B, has a magnitude of 6.57. References Category:Horizontal-branch stars Category:Binary stars Category:Eridanus (constellation) Eridani, 15 Category:Durchmusterung objects 020610 015382 0994 Category:K0III stars