B-type main-sequence star; Triangulum
HD 10390Location of HD 10390 on the map (circled)
Observation dataEpoch J2000.0 Equinox J2000.0 (ICRS ) Constellation Triangulum Right ascension 01h 42m 03.48964s [ 1] Declination +35° 14′ 44.5389″[ 1] Apparent magnitude (V)5.64[ 2] Characteristics Evolutionary stage main sequence star [ 3] Spectral type B9 IV-V[ 4] [ 5] U−Bcolor index −0.20[ 2] B−Vcolor index −0.07[ 2] Astrometry Radial velocity (Rv )−1.9± 2.0[ 6] km/s Proper motion (μ)RA: +48.763mas /yr [ 1] Dec.: −25.418mas /yr [ 1] Parallax (π)11.1882± 0.164 mas [ 1] Distance 292 ± 4 ly pc ) Absolute magnitude (MV )+1.00[ 7] Details Mass 2.62[ 8] M ☉ Radius 2.14± 0.11[ 9] R ☉ Luminosity 51.5+2.4 −2.3 [ 3] L ☉ Surface gravity (log g )4.23+0.08 −0.04 [ 10] cgs Temperature 11,076± 139[ 11] K Metallicity −0.20[ 12] dex Rotational velocity (v sin i )45[ 13] Age 50+81 −31 [ 14] Myr Other designations 6 H. Trianguli ,[ 15] AG +34°163BD +34°297FK5 1047GC 2064HD 10390HIP 7943HR 490SAO 54912TIC 61524043[ 16] Database references SIMBAD data
HD 10390 (HR 490; 51 H. Trinaguli ) is a solitarystar [ 17] constellation Triangulum . It is faintly visible to thenaked eye as a bluish-white hued point of light with anapparent magnitude of 5.64.[ 2] light-years based onGaia DR3 parallax measurements[ 1] radial velocity ofkm/s [ 6] interstellar extinction of only five-hundredths of amagnitude [ 18] absolute magnitude of +1.00.[ 7]
HD 10390 has astellar classification of B9 IV-V,[ 4] evolved B-type star with aluminosity class intermediate between asubgiant and amain sequence star . Osawa (1959) gave a class of B9 V,[ 5] B-type main-sequence star that is generating energy viahydrogen fusion at itscore . It has 2.62 times themass of the Sun [ 8] radius of the Sun .[ 9] luminosity of the Sun [ 3] photosphere at aneffective temperature ofK [ 11] iron abundance of [Fe/H] = −0.2 or 63.1% of theSun 's[ 12] projected rotational velocity ofkm/s [ 13] breakup velocity of 355 km/s.[ 19] main sequence lifetime[ 3] million years .[ 14]
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(November 1972)."Spectral classification of the bright B8 stars" .The Astronomical Journal .77 : 750.Bibcode :1972AJ.....77..750C .doi :10.1086/111348 ISSN 0004-6256 . ^a b Osawa, Kiyoteru (July 1959)."Spectral Classification of 533 B8-A2 Stars and the Mean Absolute Magnitude of A0 V Stars" .The Astrophysical Journal .130 . American Astronomical Society: 159.Bibcode :1959ApJ...130..159O .doi :10.1086/146706 ISSN 0004-637X .S2CID 120004061 . ^a b Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities".Carnegie Institute Washington D.C. Publication : 0.Bibcode :1953GCRV..C......0W .S2CID 120000732 . ^a b Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation".Astronomy Letters .38 (5):331– 346.arXiv :1108.4971 Bibcode :2012AstL...38..331A .doi :10.1134/S1063773712050015 .eISSN 1562-6873 .ISSN 1063-7737 .S2CID 119257644 . ^a b David, Trevor J.; Hillenbrand, Lynne A. 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