Star in the constellation Perseus
49 Persei is a star in the northern constellation of Perseus . It is just visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of 6.09. Based upon parallax measurements, this star is located around 147.7 light-years (45.27 parsecs) away from the Sun, but is drifting closer with a radial velocity of −44 km/s. It has a relatively large proper motion , traversing the celestial sphere at a rate of 0.220″ ·yr.
This is an aging red giant star with a stellar classification of K1III, a star that has used up its core hydrogen and is expanding. It is a candidate horizontal branch star, which would indicate it is past the red giant branch stage and is fusing helium at its core. The star is nearly four billion years old with 1.4 times the mass of the Sun and 3.7 times the Sun's radius . It is radiating eight times the luminosity of the Sun from its photosphere at an effective temperature of 5,028 K.
References
^ 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 .
^ 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 .
Roman, Nancy G. (December 1955), "A Catalogue of High-Velocity Stars", The Astrophysical Journal Supplement Series , 2 : 195, Bibcode :1955ApJS....2..195R , doi :10.1086/190021 , ISSN 0067-0049 .
^ Luck, R. Earle (January 2017), "Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants", The Astronomical Journal , 153 (1): 19, arXiv :1611.02897 , Bibcode :2017AJ....153...21L , doi :10.3847/1538-3881/153/1/21 , S2CID 119511744 , 21.
"49 Per" . SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2019-07-18.
Lépine, Sébastien; Shara, Michael M. (March 2005), "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)", The Astronomical Journal , 129 (3): 1483–1522, arXiv :astro-ph/0412070 , Bibcode :2005AJ....129.1483L , doi :10.1086/427854 , S2CID 2603568 .
Afșar, Melike; et al. (June 2018), "A Spectroscopic Survey of Field Red Horizontal-branch Stars", The Astronomical Journal , 155 (6): 25, arXiv :1804.04477 , Bibcode :2018AJ....155..240A , doi :10.3847/1538-3881/aabe86 , S2CID 119336618 , 240.
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