| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Vela |
| HD 92449 | |
| Right ascension | 10 39 18.3925 |
| Declination | −55° 36′ 11.765″ |
| Apparent magnitude (V) | 4.29 |
| HD 92463 | |
| Right ascension | 10 39 24.2778 |
| Declination | −55° 36′ 25.642″ |
| 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 |
| Distance | 780 ± 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 |
| Distance | 765 ± 7 ly (234 ± 2 pc) |
| Details | |
| Luminosity | 1370.29 L☉ |
| Temperature | 5,100 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 | |
| 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. 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 radiates 1,370 times the Sun's luminosity from its photosphere at an effective temperature of 5,100 K. It shares a common proper motion with the magnitude 6.06 star HD 92463, and the pair likely form a binary system. This secondary component is a B-type main-sequence star with a class of B8 V. As of 2000, it had an angular separation of 51.70″ along a position angle of 105° from the primary.
References
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- 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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