Astronomy:HD 47667
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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 |
| Distance | 940 ± 50 ly (290 ± 10 pc) |
| Absolute magnitude (MV) | −2.56[4] |
| Details | |
| Mass | 7.4±0.7[6] M☉ |
| Radius | 28[7] R☉ |
| Luminosity | 2,317[4] L☉ |
| Surface gravity (log g) | 1.63[2] cgs |
| Temperature | 4,200[2] K |
| Metallicity [Fe/H] | −0.21[2] dex |
| Age | 40.1±11.9[6] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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]
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
- ↑ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 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, doi:10.1051/0004-6361/201014247, Bibcode: 2010A&A...515A.111S.
- ↑ 3.0 3.1 Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series 71: 245, doi:10.1086/191373, Bibcode: 1989ApJS...71..245K.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 6.0 6.1 6.2 6.3 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, doi:10.1111/j.1365-2966.2010.17434.x, Bibcode: 2011MNRAS.410..190T.
- ↑ 7.0 7.1 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, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P.
- ↑ "HD 47667". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+47667.
- ↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
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