HD 79447

Last updated
HD 79447
Observation data
Epoch J2000.0       Equinox J2000.0
Constellation Carina
Right ascension 09h 11m 16.72089s [1]
Declination −62° 19′ 01.1295″ [1]
Apparent magnitude  (V)+3.96 [2]
Characteristics
Spectral type B3V [3]
B−V color index −0.180±0.006 [2]
Astrometry
Radial velocity (Rv)+17.5±2.7 [2]  km/s
Proper motion (μ)RA: −37.48 [1]   mas/yr
Dec.: +14.59 [1]   mas/yr
Parallax (π)6.01 ± 0.12  mas [1]
Distance 540 ± 10  ly
(166 ± 3  pc)
Absolute magnitude  (MV)−2.14 [2]
Details
Mass 7.0±0.1 [4]   M☉
Radius 5.6 [5]   R☉
Luminosity 2,054.17 [2]   L☉
Surface gravity (log g)3.5±0.1 [3]   cgs
Temperature 18,900±500 [3]   K
Rotational velocity (v sin i)0 [6]  km/s
Age 39.2±7.0 [4]   Myr
Other designations
i Car, CPD−61°1201, GC  12707, HD  79447, HIP  45101, HR  3663, SAO  250471 [7]
Database references
SIMBAD data

HD 79447 is a single [8] star in the southern constellation of Carina. It has the Bayer designation i Carinae, while HD 79447 is the identifier from the Henry Draper catalogue . This star has a blue-white hue and is visible to the naked eye with an apparent visual magnitude of +3.96. [2] It is located at a distance of approximately 540  light years from the Sun based on parallax, [1] and has an absolute magnitude of −2.14. [2] The star drifting further away with a radial velocity of +18 km/s. [2] It is a candidate member of the Lower Centaurus–Crux group of the Sco OB2 association. [9]

This object is a B-type main-sequence star with a stellar classification of B3V. [3] A surface magnetic field has been detected with a strength on the order of 1  kG . [9] It has an estimated age of around 39 [4]  million years with no measured spin rate. [6] The star has about 5.6 [5] times the radius of the Sun and 7 [4] times the Sun's mass. It is radiating over two thousand [2] times the luminosity of the Sun from its photosphere at an effective temperature of 18,900 K. [3]

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<span class="mw-page-title-main">Omega Geminorum</span> G-type bright giant star in the constellation Gemini

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HD 83058 is a subgiant star in the constellation Vela and a spectroscopic binary. It is visible to the naked eye with an apparent visual magnitude of 5.0. Based upon an annual parallax shift of 3.4254 mas, it is located 950 light-years from the Sun. The system is moving further away with a heliocentric radial velocity of +35 km/s.

HD 34255, also known HR 1720, is a star located in the northern circumpolar constellation Camelopardalis, the giraffe. It has an apparent magnitude of 5.60, allowing it to be faintly visible to the naked eye. The object is located relatively far at a distance of about 1.65 kly but is approaching the Solar System with a heliocentric radial velocity of −7.7 km/s.

References

  1. 1 2 3 4 5 6 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv: 0708.1752 , Bibcode: 2007A&A...474..653V , doi: 10.1051/0004-6361:20078357 .
  2. 1 2 3 4 5 6 7 8 9 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 Levenhagen, R. S.; Leister, N. V. (2006), "Spectroscopic analysis of southern B and Be stars", Monthly Notices of the Royal Astronomical Society, 371 (1): 252–262, arXiv: astro-ph/0606149 , Bibcode:2006MNRAS.371..252L, doi:10.1111/j.1365-2966.2006.10655.x, S2CID   16492030.
  4. 1 2 3 4 Tetzlaff, N.; et al. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society, 410 (1): 190–200, arXiv: 1007.4883 , Bibcode:2011MNRAS.410..190T, doi:10.1111/j.1365-2966.2010.17434.x, S2CID   118629873.
  5. 1 2 Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics (Third ed.), 367 (2): 521–524, arXiv: astro-ph/0012289 , Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID   425754.
  6. 1 2 Uesugi, Akira; Fukuda, Ichiro (1970), "Catalogue of rotational velocities of the stars", Contributions from the Institute of Astrophysics and Kwasan Observatory, University of Kyoto, Bibcode:1970crvs.book.....U.
  7. ↑ "HD 79447". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2020-01-25.
  8. ↑ Chini, R.; et al. (2012), "A spectroscopic survey on the multiplicity of high-mass stars", Monthly Notices of the Royal Astronomical Society, 424 (3): 1925–1929, arXiv: 1205.5238 , Bibcode:2012MNRAS.424.1925C, doi:10.1111/j.1365-2966.2012.21317.x, S2CID   119120749.
  9. 1 2 Neiner, Coralie; et al. (November 2015), "Discovery of two new bright magnetic B stars: i Car and Atlas", Monthly Notices of the Royal Astronomical Society: Letters, 454 (1): L56–L60, arXiv: 1508.06784 , Bibcode:2015MNRAS.454L..56N, doi:10.1093/mnrasl/slv128.
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