Star in the constellation Vela
HD 92449
Observation dataEpoch J2000 Equinox J2000
Constellation Vela [ 1]
HD 92449
Right ascension 10h 39m 18.3925s [ 2]
Declination −55° 36′ 11.765″[ 2]
Apparent magnitude (V)4.29[ 1]
HD 92463
Right ascension 10h 39m 24.2778s [ 3]
Declination −55° 36′ 25.642″[ 3]
Apparent magnitude (V)6.06[ 4]
Characteristics
Spectral type
G5 IIa[ 5] [ 6]
B−V color index
± 0.003[ 1]
Astrometry HD 92449 Radial velocity (Rv )± 0.7[ 7] km/s Proper motion (μ) RA: mas /yr [ 2] Dec.: mas /yr [ 2] Parallax (π)4.1595± 0.0940 mas [ 2] Distance 780 ± 20 ly pc ) Absolute magnitude (MV )−2.76[ 1] HD 92463 Proper motion (μ) RA: mas /yr [ 3] Dec.: mas /yr [ 3] Parallax (π)4.2647± 0.0405 mas [ 3] Distance 765 ± 7 ly pc ) Details A Mass 3.43[ 8] M ☉ Radius 48[ 9] R ☉ Luminosity 1,340[ 9] L ☉ Surface gravity (log g )2.02[ 8] cgs Temperature 5,180[ 8] K B Mass 3.76[ 3] M ☉ Radius 3.91[ 3] R ☉ Luminosity 308[ 3] L ☉ Surface gravity (log g )3.736[ 3] cgs Temperature 12,240[ 3] K Other designations x Vel , HR 4180WDS J10393-5536A : CD −54 3915HD 92449HIP 52154SAO 238309B : CD −54 3675HD 92463SAO 238313Database references SIMBAD HD 92449 HD 92463
HR 4180 is a double star with components HD 92449 and HD 92463 in the southern constellation of Vela . They are probably members of a binary star system.[ 10] apparent visual magnitude of 4.29.[ 1] parallax shift of the two stars it is located approximately 780 light years from the Sun.[ 2] [ 3] radial velocity of +20 km/s.[ 7]
The primary component of this system, HD 92449, is a bright giant with a stellar classification of G5 IIa.[ 5] mass of the Sun and 48 times the Sun's radius . It radiates 1,340 times the Sun's luminosity from its photosphere at an effective temperature of 5,180 K.[ 9] [ 8]
The secondary is the common proper motion HD 92463,[ 11] [ 4] [ 10] B-type main-sequence star with a class of B8 V,[ 6] [ 3] angular separation of ″ position angle of 105° from the primary.[ 4]
References
^ a b c d e 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 . XHIP record for this object at VizieR .^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties" . Astronomy and Astrophysics . 674 : A1. arXiv :2208.00211 Bibcode :2023A&A...674A...1G . doi :10.1051/0004-6361/202243940 S2CID 244398875 . Gaia DR3 record for this source at VizieR .^ a b c d e f g h i j k Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties" . Astronomy and Astrophysics . 674 : A1. arXiv :2208.00211 Bibcode :2023A&A...674A...1G . doi :10.1051/0004-6361/202243940 S2CID 244398875 . Gaia DR3 record for this source at VizieR .^ a b c Mason, B. D.; et al. (2008). "Washington Visual Double Star Catalog, 2006.5 (WDS)" . U. S. Naval Observatory, Washington D.C. Archived from the original on 2011-02-14. Retrieved 2018-08-13 . ^ a b 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 . S2CID 123149047 . ^ a b Houk, Nancy; Cowley, A. P. (1979). Michigan catalogue of two-dimensional spectral types for the HD stars . Vol. 1. Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan. Bibcode :1978mcts.book.....H . ^ 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 d Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevič, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; de Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18" . Astronomy & Astrophysics . 628 : A94. arXiv :1904.11302 Bibcode :2019A&A...628A..94A . doi :10.1051/0004-6361/201935765 ISSN 0004-6361 . ^ a b c McDonald, I.; Zijlstra, A. A.; Watson, R. A. (2017-10-01). "Fundamental parameters and infrared excesses of Tycho-Gaia stars" . Monthly Notices of the Royal Astronomical Society . 471 : 770– 791. arXiv :1706.02208 Bibcode :2017MNRAS.471..770M . doi :10.1093/mnras/stx1433 ISSN 0035-8711 . x Velorum's database entry at VizieR .^ a b Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems" . Monthly Notices of the Royal Astronomical Society . 389 (2): 869. arXiv :0806.2878 Bibcode :2008MNRAS.389..869E . doi :10.1111/j.1365-2966.2008.13596.x S2CID 14878976 . ^ Eggen, O. J. (June 15, 1980). "VY Carinae, S Normae, and photometric luminosities for bright giants and supergiants of types G and K". Astrophysical Journal, Part 1 . 238 : 919– 928. Bibcode :1980ApJ...238..919E . doi :10.1086/158055 .
