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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.[ 2] 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.[ 2] proper motion , traversing the celestial sphere at a rate of ″ −1 .[ 6]
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.[ 7] [ 4] [ 4] mass of the Sun and 3.7[ 1] Sun's radius . It is radiating eight[ 1] luminosity of the Sun from its photosphere at an effective temperature of 5,028 K.[ 1]
^ a b c d e f g h i j k 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 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 . ^ a b c d e 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.
