8 Persei
Star in the constellation Perseus
8 Persei is a single[ 8] star in the northern constellation of Perseus ,[ 7] located 416 light years away from the Sun.[ 1] It is visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of 5.757.[ 2] There is an estimated 52% chance that the star may be a member of the Hyades –Pleiades stream of co-moving stars.[ 9]
With an age of over two billion years,[ 2] this is an aging red giant of spectral type K3 III,[ 3] a star that has used up its core hydrogen and is expanding. It has 1.83[ 2] times the mass of the Sun and has reached nearly 16[ 5] times the Sun's size. The star is radiating 108[ 1] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,560 K.[ 1]
References
^ a b c d e f g h i j Brown, A. G. A. ; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties" . Astronomy & Astrophysics . 616 . A1. arXiv :1804.09365 . Bibcode :2018A&A...616A...1G . doi :10.1051/0004-6361/201833051 . Gaia DR2 record for this source at VizieR .
^ a b c d e f g h Luck, R. Earle (2015), "Abundances in the Local Region. I. G and K Giants", Astronomical Journal , 150 (3), 88, arXiv :1507.01466 , Bibcode :2015AJ....150...88L , doi :10.1088/0004-6256/150/3/88 , S2CID 118505114 .
^ a b Appenzeller, Immo (April 1967), "MK Spectral Types for 185 Bright Stars", Publications of the Astronomical Society of the Pacific , 79 (467): 102, Bibcode :1967PASP...79..102A , doi :10.1086/128449
^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters , 38 (5): 331, arXiv :1108.4971 , Bibcode :2012AstL...38..331A , doi :10.1134/S1063773712050015 , S2CID 119257644 .
^ a b c d Baines, Ellyn K.; et al. (September 2016), "Spectroscopic and Interferometric Measurements of Nine K Giant Stars", The Astronomical Journal , 152 (3): 8, arXiv :1609.02379 , Bibcode :2016AJ....152...66B , doi :10.3847/0004-6256/152/3/66 , S2CID 52904703 , 66.
^ De Medeiros, J. R.; et al. (November 2000), "Rotation and lithium in single giant stars", Astronomy and Astrophysics , 363 : 239– 243, arXiv :astro-ph/0010273 , Bibcode :2000A&A...363..239D .
^ a b "8 Per" . SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2019-03-28 .
^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society , 389 (2): 869– 879, arXiv :0806.2878 , Bibcode :2008MNRAS.389..869E , doi :10.1111/j.1365-2966.2008.13596.x , S2CID 14878976 .
^ Famaey, B.; et al. (January 2005), "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, arXiv :astro-ph/0409579 , Bibcode :2005A&A...430..165F , doi :10.1051/0004-6361:20041272 , S2CID 17804304 .