Star in the constellation Andromeda
23 Andromedae , abbreviated23 And , is a presumed single[ 9] star in theconstellation Andromeda , although it has been a suspectedspectroscopic binary .[ 10] 23 Andromedae is theFlamsteed designation . Itsapparent visual magnitude is 5.71,[ 2] parallax shift ofmas [ 1] light years . The star is moving further from the Earth with a heliocentricradial velocity of −27 km/s.[ 4] proper motion , traversing thecelestial sphere at the rate of″ [ 11]
Thestellar classification of 23 And is F0 IV,[ 3] F-type subgiant star that is in the process ofevolving into ared giant . It displays a slightmicrovariability with afrequency of 0.85784 d−1 and anamplitude of 0.0062 magnitude.[ 12] [ 6] projected rotational velocity of 36 km/s.[ 3] [ 6] mass of the Sun and is radiating 50[ 3] Sun's luminosity from itsphotosphere at aneffective temperature of 7,089 K.[ 6]
^a b c d e f 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 ^a b c 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 c d e f Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities",Astronomy & Astrophysics ,537 : A120,arXiv :1201.2052 Bibcode :2012A&A...537A.120Z ,doi :10.1051/0004-6361/201117691 ,S2CID 55586789 . ^a b 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. ^ Holmberg, J.; et al. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics",Astronomy and Astrophysics ,501 (3):941– 947,arXiv :0811.3982 Bibcode :2009A&A...501..941H ,doi :10.1051/0004-6361/200811191 ,S2CID 118577511 1 ^a b c d e f g David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets",The Astrophysical Journal ,804 (2): 146,arXiv :1501.03154 Bibcode :2015ApJ...804..146D ,doi :10.1088/0004-637X/804/2/146 ,S2CID 33401607 . ^ Gáspár, András; et al. (August 2016), "The Correlation between Metallicity and Debris Disk Mass",The Astrophysical Journal ,826 (2): 14,arXiv :1604.07403 Bibcode :2016ApJ...826..171G ,doi :10.3847/0004-637X/826/2/171 S2CID 119241004 , 171. ^ "23 And" .SIMBAD Centre de données astronomiques de Strasbourg . RetrievedSeptember 21, 2018 .^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems",Monthly Notices of the Royal Astronomical Society 389 (2):869– 879,arXiv :0806.2878 Bibcode :2008MNRAS.389..869E ,doi :10.1111/j.1365-2966.2008.13596.x S2CID 14878976 . ^ Blanco, C.; et al. (November 1982), "Chromospheric MG II emission in A5 to K5 main sequence stars from high resolution IUE spectra",Astronomy and Astrophysics ,115 (2):280– 292,Bibcode :1982A&A...115..280B . ^ 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 . ^ Koen, Chris; Eyer, Laurent (2002), "New periodic variables from the Hipparcos epoch photometry",Monthly Notices of the Royal Astronomical Society ,331 (1):45– 59,arXiv :astro-ph/0112194 Bibcode :2002MNRAS.331...45K ,doi :10.1046/j.1365-8711.2002.05150.x S2CID 10505995
