HD 6434 is a star in the southern constellation of Phoenix. Yellow dwarfs such as this are not very luminous, so at a distance of 138[2]light years it is not visible to the unaided eye. However, with binoculars it is readily visible under ideal observing conditions, having an apparent visual magnitude of 7.71.[3] The star is drifting further from the Sun with a radial velocity of +23 km/s.[2]
The star HD 6434 is named Nenque. The name was selected in the NameExoWorlds campaign by Ecuador, during the 100th anniversary of the IAU. Nenque means the Sun in the language spoken by the Indigenous Waorani tribes.[9][10]
In 2000, a planet, designated HD 6434 b, was detected in a close orbit around the star. The peer-reviewed scientific paper was published four years later.[12][7]
^Roman, Nancy G. (1987). "Identification of a Constellation From a Position". Publications of the Astronomical Society of the Pacific. 99 (617): 695–699. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Vizier query form
^ abcdefghBrown, 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.
^ abcdefghHinkel, Natalie R.; et al. (2015). "A New Analysis of the Exoplanet Hosting System HD 6434". The Astronomical Journal. 150 (6). 169. arXiv:1510.01746. Bibcode:2015AJ....150..169H. doi:10.1088/0004-6256/150/6/169. S2CID 119219444.
^ abWhite, Russel J.; Gabor, Jared M.; Hillenbrand, Lynne A. (June 2007). "High-Dispersion Optical Spectra of Nearby Stars Younger Than the Sun". The Astronomical Journal. 133 (6): 2524–2536. arXiv:0706.0542. Bibcode:2007AJ....133.2524W. doi:10.1086/514336. S2CID 122854.
^Barbieri, M.; Gratton, R. G. (March 2002). "Galactic orbits of stars with planets". Astronomy and Astrophysics. 384 (3): 879–883. arXiv:astro-ph/0112535. Bibcode:2002A&A...384..879B. doi:10.1051/0004-6361:20020011. S2CID 17066273.
^ abcBonfanti, A.; et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics. 575. A18. arXiv:1411.4302. Bibcode:2015A&A...575A..18B. doi:10.1051/0004-6361/201424951. S2CID 54555839.
^ abMayor, M.; et al. (2004). "The CORALIE survey for southern extra-solar planets XII. Orbital solutions for 16 extra-solar planets discovered with CORALIE". Astronomy and Astrophysics. 415 (1): 391–402. arXiv:astro-ph/0310316. Bibcode:2004A&A...415..391M. doi:10.1051/0004-6361:20034250. S2CID 5233877.
^"International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
^Fuhrmann, Klaus; Chini, Rolf (January 2019). "On ancient solar-type stars". Monthly Notices of the Royal Astronomical Society. 482 (1): 471–489. Bibcode:2019MNRAS.482..471F. doi:10.1093/mnras/sty2660.
^"European Southern Observatory: Six Extrasolar Planets Discovered". SpaceRef Interactive Inc. 7 August 2000. Retrieved 15 August 2009.
External linksedit
May 02, 2024
6434, star, southern, constellation, phoenix, yellow, dwarfs, such, this, very, luminous, distance, light, years, visible, unaided, however, with, binoculars, readily, visible, under, ideal, observing, conditions, having, apparent, visual, magnitude, star, dri. HD 6434 is a star in the southern constellation of Phoenix Yellow dwarfs such as this are not very luminous so at a distance of 138 2 light years it is not visible to the unaided eye However with binoculars it is readily visible under ideal observing conditions having an apparent visual magnitude of 7 71 3 The star is drifting further from the Sun with a radial velocity of 23 km s 2 HD 6434 Nenque Observation dataEpoch J2000 0 Equinox J2000 0 Constellation Phoenix 1 Right ascension 01h 04m 40 15037s 2 Declination 39 29 17 5856 2 Apparent magnitude V 7 71 0 12 3 Characteristics Spectral type G2 G3V 4 B V color index 0 61 0 01 3 AstrometryRadial velocity Rv 22 92 0 14 2 km sProper motion m RA 170 124 0 106 2 mas yr Dec 527 851 0 078 2 mas yrParallax p 23 5794 0 0417 mas 2 Distance138 3 0 2 ly 42 41 0 08 pc Absolute magnitude MV 4 69 5 Details 6 Mass0 83 0 03 M Radius1 029 0 004 R Luminosity1 208 0 004 L Surface gravity log g 4 31 0 01 cgsTemperature5 907 71 KMetallicity Fe H 0 48 0 05 3 dexRotation18 6 d 7 Rotational velocity v sin i 2 2 0 5 3 km sAge12 2 0 8 Gyr Other designationsCD 40 239 GJ 9037 HD 6434 HIP 5054 SAO 192911 LFT 102 LHS 1188 LPM 57 LTT 610 GCRV 51158 2MASS J01044015 3929173 8 Database referencesSIMBADdataARICNSdata The star HD 6434 is named Nenque The name was selected in the NameExoWorlds campaign by Ecuador during the 100th anniversary of the IAU Nenque means the Sun in the language spoken by the Indigenous Waorani tribes 9 10 This object is a Sun like G type main sequence star with a stellar classification of G2 G3V 4 It is an ancient population II 11 star with an estimated age of 12 6 billion years and is one of the most metal deficient stars known to host a planet 3 This star is spinning at a leisurely rate with a projected rotational velocity of 2 2 km s 3 It has 88 of the mass of the Sun but is nearly the same size HD 6434 is radiating 1 2 times the luminosity of the Sun from its photosphere at an effective temperature of 5 907 K 6 Contents 1 Planetary system 2 See also 3 References 4 External linksPlanetary system editIn 2000 a planet designated HD 6434 b was detected in a close orbit around the star The peer reviewed scientific paper was published four years later 12 7 The HD 6434 planetary system 3 Companion in order from star Mass Semimajor axis AU Orbital period days Eccentricity Inclination Radius b Eyeke gt 0 44 0 01 M J 0 148 0 002 22 0170 0 0008 0 146 0 025 See also edit94 Ceti List of extrasolar planetsReferences edit Roman Nancy G 1987 Identification of a Constellation From a Position Publications of the Astronomical Society of the Pacific 99 617 695 699 Bibcode 1987PASP 99 695R doi 10 1086 132034 Vizier query form a b c d e f g h Brown A G A et al Gaia collaboration August 2018 Gaia Data Release 2 Summary of the contents and survey properties Astronomy amp Astrophysics 616 A1 arXiv 1804 09365 Bibcode 2018A amp A 616A 1G doi 10 1051 0004 6361 201833051 Gaia DR2 record for this source at VizieR a b c d e f g h Hinkel Natalie R et al 2015 A New Analysis of the Exoplanet Hosting System HD 6434 The Astronomical Journal 150 6 169 arXiv 1510 01746 Bibcode 2015AJ 150 169H doi 10 1088 0004 6256 150 6 169 S2CID 119219444 a b White Russel J Gabor Jared M Hillenbrand Lynne A June 2007 High Dispersion Optical Spectra of Nearby Stars Younger Than the Sun The Astronomical Journal 133 6 2524 2536 arXiv 0706 0542 Bibcode 2007AJ 133 2524W doi 10 1086 514336 S2CID 122854 Barbieri M Gratton R G March 2002 Galactic orbits of stars with planets Astronomy and Astrophysics 384 3 879 883 arXiv astro ph 0112535 Bibcode 2002A amp A 384 879B doi 10 1051 0004 6361 20020011 S2CID 17066273 a b c Bonfanti A et al 2015 Revising the ages of planet hosting stars Astronomy and Astrophysics 575 A18 arXiv 1411 4302 Bibcode 2015A amp A 575A 18B doi 10 1051 0004 6361 201424951 S2CID 54555839 a b Mayor M et al 2004 The CORALIE survey for southern extra solar planets XII Orbital solutions for 16 extra solar planets discovered with CORALIE Astronomy and Astrophysics 415 1 391 402 arXiv astro ph 0310316 Bibcode 2004A amp A 415 391M doi 10 1051 0004 6361 20034250 S2CID 5233877 HD 6434 SIMBAD Centre de donnees astronomiques de Strasbourg Retrieved 2014 09 08 Approved names NameExoworlds Retrieved 2020 01 02 International Astronomical Union IAU www iau org Retrieved 2020 01 02 Fuhrmann Klaus Chini Rolf January 2019 On ancient solar type stars Monthly Notices of the Royal Astronomical Society 482 1 471 489 Bibcode 2019MNRAS 482 471F doi 10 1093 mnras sty2660 European Southern Observatory Six Extrasolar Planets Discovered SpaceRef Interactive Inc 7 August 2000 Retrieved 15 August 2009 External links edit Retrieved from https en wikipedia org w index php title HD 6434 amp oldid 1172053639, wikipedia, wiki, book, books, library,
