High proper motion star
HD 194953 (HR 7824 ) is a solitary star in the equatorial constellation Delphinus . It is faintly visible to the naked eye with an apparent magnitude of 6.19 and is located 414 light years away. However, it is approaching the Solar System with a heliocentric radial velocity of −28 km/s .
HD 194953 has a stellar classification of G8 III/IV — a blended luminosity class of a subgiant and giant . It has 2.38 times the mass of the Sun and an enlarged radius of 10.2 R ☉ at an age of 640 million years . It radiates at 54 times the luminosity of the Sun from its photosphere at an effective temperature of 5,101 K , giving a yellow hue. HD 194953 is slightly metal deficient with an iron abundance 78% that of the Sun and spins leisurely with a projected rotational velocity of about 2.4 km/s .
References
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^ Luck, R. Earle (25 August 2015). "Abundances in the Local Region. I. G and K Giants". The Astronomical Journal . 150 (3): 88. arXiv :1507.01466 . Bibcode :2015AJ....150...88L . doi :10.1088/0004-6256/150/3/88 . eISSN 1538-3881 . ISSN 0004-6256 . S2CID 118505114 .
^ Liu, Y. J.; Tan, K. F.; Wang, L.; Zhao, G.; Sato, Bun'ei; Takeda, Y.; Li, H. N. (31 March 2014). "The Lithium Abundances of a Large Sample of Red Giants" . The Astrophysical Journal . 785 (2): 94. arXiv :1404.1687 . Bibcode :2014ApJ...785...94L . doi :10.1088/0004-637X/785/2/94 . eISSN 1538-4357 . ISSN 0004-637X .
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"HR 7824" . SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved June 21, 2022.
Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino . 1 . Bibcode :1879RNAO....1.....G .
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