HR 4180
| 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] |
| Distance | 780 ± 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] |
| Distance | 765 ± 7 ly (234 ± 2 pc) |
| Details | |
| Luminosity | 1370.29[7] L☉ |
| Temperature | 5,100[7] K |
| Other designations | |
| 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.[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[edit]
- ^ 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 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.
- ^ 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 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 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.
- ^ 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.
- ^ 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.
- ^ 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.
