HD 47667

HD 47667 is a single[9] star in the southern constellation of Canis Major. It is visible to the naked eye with an apparent visual magnitude of 4.832.[2] The estimated distance to this star, based upon an annual parallax shift of 3.30±0.35 mas,[1] is roughly 1,000 light years. It is moving further away with a heliocentric radial velocity of +29 km/s.[4] The star made its closest approach to the Sun some 8.7 million years ago at a separation of around 362 ly (111.12 pc).[4]

HD 47667
Observation data
Epoch J2000      Equinox J2000
Constellation Canis Major
Right ascension 06h 39m 16.71946s[1]
Declination −14° 08′ 44.7468″[1]
Apparent magnitude (V) 4.832[2]
Characteristics
Spectral type K2+ IIIa CN0.5 Ca1[3]
B−V color index 1.459±0.072[4]
Astrometry
Radial velocity (Rv)+28.9±0.4[4] km/s
Proper motion (μ) RA: +5.11[1] mas/yr
Dec.: −6.65[1] mas/yr
Parallax (π)3.4781 ± 0.1727[5] mas
Distance940 ± 50 ly
(290 ± 10 pc)
Absolute magnitude (MV)−2.56[4]
Details
Mass7.4±0.7[6] M☉
Radius28[7] R☉
Luminosity2,317[4] L☉
Surface gravity (log g)1.63[2] cgs
Temperature4,200[2] K
Metallicity [Fe/H]−0.21[2] dex
Age40.1±11.9[6] Myr
Other designations
BD−14° 1525, FK5 2515, HD 47667, HIP 31827, HR 2450, SAO 151751[8]
Database references
SIMBADdata

Roughly 40 million years old,[6] this is an evolved K-type giant star with a stellar classification of K2+ IIIa CN0.5 Ca1.[3] The suffix notation indicates overabundances of calcium and the cyanide molecule have been found in the spectrum of the stellar atmosphere. The star has 7.4[6] times the mass of the Sun and has expanded to 28[7] times the Sun's radius. It is radiating 2,317[4] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,200 K.[2]

References
  1. 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. Soubiran, C.; Le Campion, J.-F.; Cayrel de Strobel, G.; Caillo, A. (June 2010), "The PASTEL catalogue of stellar parameters", Astronomy and Astrophysics, 515: A111, arXiv:1004.1069, Bibcode:2010A&A...515A.111S, doi:10.1051/0004-6361/201014247.
  3. 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.
  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.
  5. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  6. Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (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.
  7. Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition", Astronomy and Astrophysics, 367 (2): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451.
  8. "HD 47667". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-06-12.
  9. Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.
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