Star in the constellation Andromeda
6 Persei Location of 6 Persei (circled)
Observation dataEpoch J2000 Equinox J2000 Constellation Andromeda [ 1] Right ascension 02h 13m 36.34084s [ 2] Declination +51° 03′ 56.8222″[ 2] Apparent magnitude (V)5.29[ 3] Characteristics Spectral type G8.5 IIIb Fe-2 [ 3] B−Vcolor index 0.926[ 4] Astrometry Radial velocity (Rv )± 0.27[ 5] km/s Proper motion (μ)RA: +344.397[ 2] mas /yr Dec.: −164.853[ 2] mas /yr Parallax (π)17.8901± 0.0943 mas [ 2] Distance 182.3 ± 1.0 ly pc ) Absolute magnitude (MV )± 0.07[ 6] Orbit [ 6] Period (P)± 0.04 dEccentricity (e)± 0.0007Inclination (i)104° Periastron epoch (T)± 0.12 JD Argument of periastron (ω)± 0.3Semi-amplitude 1 )± 0.06Details[ 4] Mass 1.5 M ☉ Radius 7 R ☉ Luminosity 26.3 L ☉ Surface gravity (log g )3.0 cgs Temperature 4,920 K Metallicity [Fe/H] −0.60 dex Rotational velocity (v sin i )0.0 km/s Other designations NSV 747AG +50°249BD +50°481FK5 77HD 13530HIP 10366HR 645SAO 23047PPM 27263WDS J02136+5104A[ 7] Database references SIMBAD data
6 Persei is abinary star [ 8] constellation ofAndromeda .[ 9] apparent visual magnitude of 5.29.[ 3] light years from Earth, as determined from its annualparallax shift ofmas [ 2] radial velocity of +42 km/s.[ 5] proper motion , traversing thecelestial sphere at the rate of[ 10]
This is a single-linedspectroscopic binary with anorbital period of 4.3155 yr and aneccentricity of 0.88. Thea sini value for the primary is± 0.9 Gm a is thesemimajor axis andi is theorbital inclination . The inclination is estimated to be 104°.[ 6]
The visible component is anevolved giant star with astellar classification ofG8.5 IIIb Fe-2 ,[ 3] spectrum . It has 1.5 times themass of the Sun and has expanded to 7 times theSun's radius . The star is radiating 26 times theSun's luminosity from its enlargedphotosphere at aneffective temperature of 4,920 K.[ 4] angular separation of″ position angle of 57°, as of 2004.[ 11]
^ Roman, Nancy G. (1987)."Identification of a constellation from a position" .Publications of the Astronomical Society of the Pacific 99 (617): 695.Bibcode :1987PASP...99..695R .doi :10.1086/132034 Constellation record for this object atVizieR .^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 Gaia DR2 record for this source atVizieR .^a b c d Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars",Astrophysical Journal Supplement Series ,71 : 245,Bibcode :1989ApJS...71..245K ,doi :10.1086/191373 . ^a b c Massarotti, Alessandro; et al. (January 2008), "Rotational and Radial Velocities for a Sample of 761 Hipparcos Giants and the Role of Binarity",The Astronomical Journal ,135 (1):209– 231,Bibcode :2008AJ....135..209M ,doi :10.1088/0004-6256/135/1/209 ^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. ^a b c Scarfe, C. D. (October 2017), "Spectroscopic Orbits of Three Binaries",Revista Mexicana de Astronomía y Astrofísica ,53 :333– 347,Bibcode :2017RMxAA..53..333S . ^ "HD 13530" .SIMBAD Centre de données astronomiques de Strasbourg . Retrieved20 August 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 . ^ Sinnott, Roger W.; Perryman, Michael A. C. (1997),Millennium Star Atlas , vol. 1, Sky Publishing Corporation and the European Space Agency, p. 81,ISBN 0-933346-82-4 ^ 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 . ^ Mason, Brian D.; et al. (December 2001), "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog",The Astronomical Journal ,122 (6):3466– 3471,Bibcode :2017yCat....102026M ,doi :10.1086/323920
