HR 4180

Last updated
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]
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
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. [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]

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References

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  2. 1 2 3 4 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. 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.
  4. 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.
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  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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