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HR 4180

HD 92449
Observation data
Epoch J2000      Equinox J2000
Constellation Vela
HD 92449
Right ascension 10h 39m 18.3925s[1]
Declination −55° 36′ 11.765″[1]
Apparent magnitude (V) 4.29[2]
HD 92463
Right ascension 10h 39m 24.2778s[3]
Declination −55° 36′ 25.642″[3]
Characteristics
Spectral type G5 IIa[4] + B8 V[5]
B−V color index 1.025±0.003[2]
Astrometry
HD 92449
Radial velocity (Rv)+20.1±0.7[6] km/s
Proper motion (μ) RA: −19.032(91) mas/yr[1]
Dec.: 5.032(90) mas/yr[1]
Parallax (π)4.1595 ± 0.0940 mas[1]
Distance780 ± 20 ly
(240 ± 5 pc)
Absolute magnitude (MV)−2.76[2]
HD 92463
Proper motion (μ) RA: −18.941(40) mas/yr[3]
Dec.: 5.386(42) mas/yr[3]
Parallax (π)4.2647 ± 0.0405 mas[3]
Distance765 ± 7 ly
(234 ± 2 pc)
Details
Luminosity1370.29[7] L☉
Temperature5,100[7] K
Other designations
x Vel, HR 4180, WDS J10393-5536
A: CD−54 3915, HD 92449, HIP 52154, SAO 238309
B: CD−54 3675, HD 92463, SAO 238313
Database references
SIMBADHD 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.[8] HR 4180 can be viewed with the naked eye, having an apparent visual magnitude of 4.29.[2] Based upon the annual parallax shift of the two stars it is located approximately 780 light years from the Sun.[1][3] The system is moving further from the Earth with a heliocentric radial velocity of +20 km/s.[6]

The primary component of this system, HD 92449, is a bright giant with a stellar classification of G5 IIa.[4] The star radiates 1,370 times the Sun's luminosity from its photosphere at an effective temperature of 5,100 K.[7] It shares a common proper motion with the magnitude 6.06[9] star HD 92463,[10] and the pair likely form a binary system.[8] This secondary component is a B-type main-sequence star with a class of B8 V.[5] As of 2000, it had an angular separation of 51.70″ along a position angle of 105° from the primary.[9]

References

  1. ^ 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.
  2. ^ a b c d 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.
  3. ^ 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.
  4. ^ 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.
  5. ^ 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.
  6. ^ 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.
  7. ^ a b c McDonald, I.; et al. (2012), "Fundamental parameters and infrared excesses of Hipparcos stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–357, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x, S2CID 118665352.
  8. ^ 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.
  9. ^ a b 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.
  10. ^ 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.
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