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Triple star system in the constellation Andromeda
Psi Andromedae (ψ And, ψ Andromedae) is the Bayer designation for a triple star [ 4] constellation of Andromeda . The combined apparent visual magnitude of this system is 4.95.[ 2] parallax measurements, is roughly 2,000 light-years (610 parsecs ) from Earth.[ 1]
The primary component has a stellar classification of G5 Ib,[ 3] spectrum of an evolved supergiant star. It forms a pair with a star of type B9 with an unknown luminosity class separated by 0.28 arcseconds . A third component has a separation of 0.14 arcseconds. Details of the orbital arrangement remain uncertain.[ 4]
In Chinese , 螣蛇 Téng Shé Flying Serpent α Lacertae , 4 Lacertae , π2 Cygni , π1 Cygni , HD 206267 , ε Cephei , β Lacertae , σ Cassiopeiae , ρ Cassiopeiae , τ Cassiopeiae , AR Cassiopeiae , 9 Lacertae , 3 Andromedae , 7 Andromedae , 8 Andromedae , λ Andromedae , κ Andromedae and ι Andromedae ,. Consequently, the Chinese name for ψ Andromedae itself is 螣蛇二十 Téng Shé èrshí the Twentieth of Flying Serpent ).[ 7]
^ a b c d e f Brown, A. G. A. ; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties" . Astronomy & Astrophysics 649 : A1. arXiv :2012.01533 Bibcode :2021A&A...649A...1G . doi :10.1051/0004-6361/202039657 S2CID 227254300 . (Erratum: doi :10.1051/0004-6361/202039657e ) . Gaia EDR3 record for this source at VizieR .^ a b c Argue, A. N. (1966), "UBV photometry of 550 F, G and K type stars", Monthly Notices of the Royal Astronomical Society 133 (4): 475–493, Bibcode :1966MNRAS.133..475A , doi :10.1093/mnras/133.4.475 ^ a b c d e f g h Soubiran, C.; et al. (March 2008), "Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants", Astronomy and Astrophysics , 480 (1): 91–101, arXiv :0712.1370 Bibcode :2008A&A...480...91S , doi :10.1051/0004-6361:20078788 , S2CID 16602121 . ^ a b c d e f g Parsons, Sidney B. (May 2004), "New and Confirmed Triple Systems with Luminous Cool Primaries and Hot Companions", The Astronomical Journal , 127 (5): 2915–2930, Bibcode :2004AJ....127.2915P , doi :10.1086/383546 ^ a b McDonald, I.; Zijlstra, A. A.; Watson, R. A. (2017-10-01). "Fundamental parameters and infrared excesses of Tycho-Gaia stars" . Monthly Notices of the Royal Astronomical Society . 471 (1): 770–791. arXiv :1706.02208 Bibcode :2017MNRAS.471..770M . doi :10.1093/mnras/stx1433 ISSN 0035-8711 . Psi Andromedae's database entry at VizieR .^ "* psi And" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 28 January 2018 .^ (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 7 日 Archived 2011-05-21 at the Wayback Machine
