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Binary star system in the constellation Andromeda
HD 224635 and HD 224636 is a pair of stars comprising a binary star system in the constellation Andromeda . They are located approximately 94 light years away[ 7] [ 2]
The primary star is HD 224635, a magnitude 6.46[ 2] spectral type F8[ 4] Sun .[ 8]
The secondary star is the slightly fainter HD 224636, with an apparent visual magnitude of 6.72,[ 2] [ 4] [ 8]
^ a b 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 Malkov, O. Yu.; et al. (2012), "Dynamical Masses of a Selected Sample of Orbital Binaries", Astronomy & Astrophysics , 546 : 5, Bibcode :2012A&A...546A..69M , doi :10.1051/0004-6361/201219774 ^ a b 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 Struve, Otto; Franklin, K. L. (1955). "Spectrographic Observations of Visual Double Stars". The Astrophysical Journal . 121 : 337. Bibcode :1955ApJ...121..337S . doi :10.1086/145993 . ^ a b Fabricius, C.; Høg, E.; Makarov, V. V.; Mason, B. D.; Wycoff, G. L.; Urban, S. E. (2002). "The Tycho double star catalogue" . Astronomy and Astrophysics . 384 : 180–189. Bibcode :2002A&A...384..180F . doi :10.1051/0004-6361:20011822 ^ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics , 546 : 14, arXiv :1208.3048 Bibcode :2012A&A...546A..61D , doi :10.1051/0004-6361/201219219 , S2CID 59451347 , A61. ^ a b c d van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics , 474 (2): 653–664, arXiv :0708.1752 Bibcode :2007A&A...474..653V , doi :10.1051/0004-6361:20078357 , S2CID 18759600 . ^ a b c Tokovinin, Andrei (2014). "From Binaries to Multiples. II. Hierarchical Multiplicity of F and G Dwarfs". The Astronomical Journal . 147 (4): 14. arXiv :1401.6827 Bibcode :2014AJ....147...87T . doi :10.1088/0004-6256/147/4/87 . S2CID 56066740 . 87. ^ 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 Soubiran, Caroline; et al. (2016), "The PASTEL catalogue: 2016 version", Astronomy & Astrophysics , 591 : A118, arXiv :1605.07384 Bibcode :2016A&A...591A.118S , doi :10.1051/0004-6361/201628497 , S2CID 119258214 .
