B-type subgiant star in the constellation Cygnus
For other stars with this Bayer designation, see
ω Cygni .
Omega1 Cygni Location of ω
1 Cygni (circled in red)
Observation dataEpoch J2000.0 Equinox J2000.0 (ICRS ) Constellation Cygnus Right ascension 20h 30m 03.54116s [ 1] Declination +48° 57′ 05.6446″[ 1] Apparent magnitude (V)+4.93 - 4.96[ 2] Characteristics Spectral type B2.5 IV[ 3] U−Bcolor index −0.68[ 4] B−Vcolor index −0.09[ 4] Variable type β Cep [ 5] (λ Eri [ 2] Astrometry Radial velocity (Rv )± 2.0[ 6] km/s Proper motion (μ)RA: +10.883[ 7] mas /yr Dec.: +7.057[ 7] mas /yr Parallax (π)2.5878± 0.1637 mas [ 7] Distance 1,260 ± 80 ly pc ) Absolute magnitude (MV )−2.65[ 8] Details Mass ± 0.2[ 3] M ☉ Radius 4.55[ 9] [ a] R ☉ Luminosity 1,549[ 9] L ☉ Surface gravity (log g )2.312[ 10] cgs Temperature 16,982[ 9] K Metallicity [Fe/H] 0.0[ 8] dex Rotational velocity (v sin i )145[ 11] Age ± 4.5[ 3] Myr Other designations ω1 Cyg ,45 Cygni,BD +48°3142,FK5 3641,HD 195556,HIP 101138,HR 7844,SAO 49712,V2014 Cygni[ 12] Database references SIMBAD data
Omega1 Cygni ,Latinized fromω1 Cygni , is theBayer designation for a solitary[ 13] star in the northernconstellation ofCygnus . It is visible to the naked eye with anapparent visual magnitude of 4.94.[ 4] parallax shift ofmas [ 7] light years Sun . Relative to its neighbors, this star has apeculiar velocity of± 2.2 km/s[ 6]
Alight curve for V2014 Cygni, plotted fromTESS [ 14] This is a somewhatevolved B-type subgiant star with astellar classification of B2.5 IV.[ 3] Beta Cephei variable with a high degree of confidence as they found regular pulsations in itsspectrum in a high-resolution spectroscopy study published in 2006.[ 5] [ 15]
^a b van Leeuwen, F. (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 "V2014 Cygni" ,International Variable Star Index , retrieved2020-09-02 ^a b c d Tetzlaff, N.; et al. (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 . ^a b c Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)",Catalogue of Eggen's UBV Data ,SIMBAD ,Bibcode :1986EgUBV........0M . ^a b Telting, J. H.; et al. (June 2006), "A high-resolution spectroscopy survey of β Cephei pulsations in bright stars",Astronomy and Astrophysics ,452 (3):945– 953,Bibcode :2006A&A...452..945T ,doi :10.1051/0004-6361:20054730 hdl :2066/36162 ^a b Bobylev, V. V.; Bajkova, A. T. (August 2013), "Galactic kinematics from a sample of young massive stars",Astronomy Letters ,39 (8):532– 549,arXiv :1307.1677 Bibcode :2013AstL...39..532B ,doi :10.1134/S106377371308001X ,S2CID 118568203 . ^a b c d 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 Gontcharov, G. A. (2012), "Dependence of kinematics on the age of stars in the solar neighborhood",Astronomy Letters ,38 (12):771– 782,arXiv :1606.08814 Bibcode :2012AstL...38..771G ,doi :10.1134/S1063773712120031 ,S2CID 118345778 . ^a b c Simón-Díaz, S.; Godart, M.; Castro, N.; Herrero, A.; Aerts, C.; Puls, J.; Telting, J.; Grassitelli, L. (2017), "The IACOB project . III. New observational clues to understand macroturbulent broadening in massive O- and B-type stars",Astronomy and Astrophysics ,597 : A22,arXiv :1608.05508 Bibcode :2017A&A...597A..22S ,doi :10.1051/0004-6361/201628541 ,S2CID 3478126 . ^ McDonald, I.; Zijlstra, A. A.; Watson, R. A. (2017), "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 S2CID 73594365 . ^ 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 ^ "* ome01 Cyg -- Pulsating variable Star" .SIMBAD Centre de données astronomiques de Strasbourg . Retrieved2017-02-22 .^ 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 . ^ "MAST: Barbara A. Mikulski Archive for Space Telescopes" . Space Telescope Science Institute. Retrieved27 November 2022 .^ Lefèvre, L.; et al. (2009), "A systematic study of variability among OB-stars based on HIPPARCOS photometry",Astronomy and Astrophysics ,507 (2): 1141,Bibcode :2009A&A...507.1141L ,doi :10.1051/0004-6361/200912304
