HR 4180

HR 4180
Location of HR 4180 (circled in red)
Observation data
Epoch J2000      Equinox ICRS
Constellation Vela
HD 92449
Right ascension 10h 39m 18.3925s
Declination −55° 36′ 11.765″
Apparent magnitude (V) 4.29
HD 92463
Right ascension 10h 39m 24.2778s
Declination −55° 36′ 25.642″
Apparent magnitude (V) 6.06
Characteristics
Spectral type G5 IIa + B8 V
B−V color index 1.025±0.003
Astrometry
HD 92449
Radial velocity (Rv)+20.1±0.7 km/s
Proper motion (μ) RA: −19.032(91) mas/yr
Dec.: 5.032(90) mas/yr
Parallax (π)4.1595±0.0940 mas
Distance780 ± 20 ly
(240 ± 5 pc)
Absolute magnitude (MV)−2.76
HD 92463
Proper motion (μ) RA: −18.941(40) mas/yr
Dec.: 5.386(42) mas/yr
Parallax (π)4.2647±0.0405 mas
Distance765 ± 7 ly
(234 ± 2 pc)
Details
A
Mass3.43 M☉
Radius48 R☉
Luminosity1,340 L☉
Surface gravity (log g)2.02 cgs
Temperature5,180 K
B
Mass3.76 M☉
Radius3.91 R☉
Luminosity308 L☉
Surface gravity (log g)3.736 cgs
Temperature12,240 K
Other designations
x Vel, HR 4180, WDS J10393-5536
A: CPD−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. HR 4180 can be viewed with the naked eye, having an apparent visual magnitude of 4.29. Based upon the annual parallax shift of the two stars it is located approximately 780 light years from the Sun. The system is moving further from the Earth with a heliocentric radial velocity of +20 km/s.

The primary component of this system, HD 92449, is a bright giant with a stellar classification of G5 IIa. The star is estimated to have 3.4 times the 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.

The secondary is the common proper motion HD 92463, of apparent magnitude 6.06. The pair likely form a binary system. This secondary component is a B-type main-sequence star with a class of B8 V, and has an estimated 3.8 times the mass, 3.9 times the radius, and 308 times the Sun's luminosity. As of 2000, it had an angular separation of 51.70″ along a position angle of 105° from the primary.

References

  1. 1 2 3 4 5 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.
  2. 1 2 3 4 5 6 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.
  3. 1 2 3 4 5 6 7 8 9 10 11 12 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. 1 2 3 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.
  5. 1 2 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.
  6. 1 2 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.
  7. 1 2 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.
  8. 1 2 3 4 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.
  9. 1 2 3 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 (1): 770–791. arXiv:1706.02208. Bibcode:2017MNRAS.471..770M. doi:10.1093/mnras/stx1433. ISSN 0035-8711. x Velorum's database entry at VizieR.
  10. 1 2 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.
  11. ↑ 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.