Binary star in the constellation Andromeda
Nu Andromedae Location of ν Andromedae (circled)
Observation dataEpoch J2000 Equinox J2000 Constellation Andromeda Right ascension 00h 49m 48.846s [ 1] Declination +41° 04′ 44.08″[ 1] Apparent magnitude (V)4.522[ 2] Characteristics Spectral type B4/5 V[ 3] [ 4] [ 5] U−Bcolor index –0.573[ 2] B−Vcolor index –0.136[ 2] Astrometry Radial velocity (Rv )–23.9[ 6] km/s Proper motion (μ)RA: +21.711mas /yr [ 1] Dec.: –18.694mas /yr [ 1] Parallax (π)5.7868± 0.1857 mas [ 1] Distance 560 ± 20 ly pc ) Absolute magnitude (MV )−1.85[ 7] Orbit [ 5] Period (P)4.2827 d Eccentricity (e)0.03 Longitude of the node (Ω)25.° Periastron epoch (T)18,155.67 Semi-amplitude 1 )71.7 km/s Semi-amplitude (K2 )101.9 km/s Details ν And A Mass 5.9± 0.2[ 3] M ☉ Radius 3.4[ 8] R ☉ Luminosity 1,104[ 7] L ☉ Surface gravity (log g )4.12± 0.43[ 9] cgs Temperature 14,851± 396[ 9] K Metallicity +0.14± 0.17[ 9] dex Rotational velocity (v sin i )20[ 10] Age 63.1± 17.9[ 3] Myr Other designations ν Andromedae, ν And, Nu And ,35 Andromedae, 35 And ,BD +40 171FK5 1021HD 4727HIP 3881HR 226SAO 36699PPM 43365[ 11] Database references SIMBAD data
Nu Andromedae is abinary star system in theconstellation Andromeda . ItsBayer designation isLatinized fromν Andromedae , and abbreviatedNu And orν And , respectively. The system has anapparent visual magnitude of 4.5,[ 2] naked eye . Based onparallax measurements, it is located at a distance of approximately 560light-years (170parsecs ) fromEarth .[ 1] radial velocity of –24 km/s.[ 6] Andromeda Galaxy .[ 12]
Nu Andromedae is the prominent blue star in the upper right of this image. At the center is the Andromeda Galaxy. Nu Andromedae is closespectroscopic binary [ 3] [ 5] B-type main sequence star with astellar classification of B5 V.[ 3] [ 5] F-type main sequence star . The pair is about 63 million years old.[ 3]
The pair have apeculiar velocity of± 0.87 km/srunaway star system but does suggest it escaped itsstar cluster of origin. The trajectory indicates it may have left theNGC 6405 cluster some 25 million years ago.[ 13]
InChinese ,奎宿 Kuí Sù Legs (asterism)η Andromedae ,65 Piscium ,ζ Andromedae ,ε Andromedae ,δ Andromedae ,π Andromedae ,μ Andromedae ,β Andromedae ,σ Piscium ,τ Piscium ,91 Piscium ,υ Piscium ,φ Piscium ,χ Piscium andψ1 Piscium . Consequently, theChinese name for ν Andromedae itself is奎宿七 Kuí Sù qī the Seventh Star of Legs .)[ 14]
^a b c d e 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 atVizieR .^a b c d Oja, T. (April 1983), "UBV photometry of FK4 and FK4 supplement stars",Astronomy and Astrophysics Supplement Series ,52 :131– 134,Bibcode :1983A&AS...52..131O . ^a b c d e f Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun",Monthly Notices of the Royal Astronomical Society 410 (1):190– 200,arXiv :1007.4883 Bibcode :2011MNRAS.410..190T ,doi :10.1111/j.1365-2966.2010.17434.x S2CID 118629873 . ^ "Nu Andromedae, a blue main-sequence star in Andromeda" ,astrostudio.org , archived fromthe original on 23 September 2015, retrieved18 August 2014 .^a b c d Pourbaix, D.; et al. (September 2004), "SB9: The ninth catalogue of spectroscopic binary orbits",Astronomy and Astrophysics ,424 (2):727– 732,arXiv :astro-ph/0406573 Bibcode :2004A&A...424..727P ,doi :10.1051/0004-6361:20041213 ,S2CID 119387088 . ^a b Wilson, R. E. (1953), "General Catalogue of Stellar Radial Velocities",Carnegie Institute Washington D.C. Publication ,Carnegie Institute of Washington D.C. ,Bibcode :1953GCRV..C......0W . ^a b 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 . ^ Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics",Astronomy and Astrophysics ,367 (2):521– 524,arXiv :astro-ph/0012289 Bibcode :2001A&A...367..521P ,doi :10.1051/0004-6361:20000451 ,S2CID 425754 . ^a b c Koleva, M.; Vazdekis, A. (February 2012), "Stellar population models in the UV. I. Characterisation of the New Generation Stellar Library",Astronomy & Astrophysics ,538 : A143,arXiv :1111.5449 Bibcode :2012A&A...538A.143K ,doi :10.1051/0004-6361/201118065 ,S2CID 53999614 . ^ Abt, Helmut A.; Levato, Hugo; Grosso, Monica (July 2002), "Rotational Velocities of B Stars",The Astrophysical Journal ,573 (1):359– 365,Bibcode :2002ApJ...573..359A ,doi :10.1086/340590 ^ "35 And -- Star" ,SIMBAD Centre de données astronomiques de Strasbourg , retrieved2012-06-22 ^ Mollise, Rod (2006),The Urban Astronomer's Guide: A Walking Tour of the Cosmos for City Sky Watchers ISBN 1846282160 ^ Bhat, A.; et al. (July 2022), "The origin of early-type runaway stars from open clusters",Astronomy & Astrophysics ,663 , id. A39,arXiv :2204.01594 Bibcode :2022A&A...663A..39B ,doi :10.1051/0004-6361/202142993 . ^ (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 19 日 Archived 2016-03-03 at theWayback Machine Kaler, James B."Nu And" .Stars . Retrieved11 September 2010 .
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