HD 6434

HD 6434
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Phoenix[1]
Right ascension 01h 04m 40.151s[2]
Declination –39° 29′ 17.58″[2]
Apparent magnitude (V) 7.71[3]
Characteristics
Spectral type G2/G3V
Astrometry
Proper motion (μ) RA: –169.44 ± 0.53[2] mas/yr
Dec.: –527.67 ± 0.36[2] mas/yr
Parallax (π)24.17 ± 0.61[2] mas
Distance135 ± 3 ly
(41 ± 1 pc)
Details
Mass0.83 ± 0.03[4] M☉
Radius1.029 ± 0.004[4] R☉
Luminosity1.208 ± 0.004[4] L☉
Surface gravity (log g)4.31 ± 0.01[4] cgs
Temperature5907 ± 71[4] K
Age12.2 ± 0.8[4] Gyr
Other designations
CD–40°239, GCRV 51158, GJ 9037, HIP 5054, LFT 102, LHS 1188, LPM 57, LTT 610, SAO 192911[3]
Database references
SIMBADdata
ARICNSdata

HD 6434 is an 8th magnitude star in the constellation of Phoenix. It is a very Sun-like yellow dwarf star, but much older, being 12.2 billion years old.[4] Yellow dwarfs are not very luminous, so at a distance of 135 light years it is not visible to the unaided eye. With binoculars it is readily visible under ideal observing conditions.

In 2000, a planet was observed orbiting it while the peer reviewed scientific paper was published four years later.[5][6]

The HD 6434 planetary system[7]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b >0.44±0.01 MJ 0.148±0.002 22.0170±0.0008 0.146±0.025 — —

See also

References

  1. ↑ 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
  2. 1 2 3 4 5 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. Vizier catalog entry
  3. 1 2 "HD 6434". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2014-09-08.
  4. 1 2 3 4 5 6 7 Bonfanti, 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.
  5. ↑ "European Southern Observatory: Six Extrasolar Planets Discovered". SpaceRef Interactive Inc. 7 August 2000. Retrieved 15 August 2009.
  6. ↑ 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&A...415..391M. doi:10.1051/0004-6361:20034250.
  7. ↑ 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.

Coordinates: 01h 04m 40.1511s, −39° 29′ 17.583″


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