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) | 7.72 |
| 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 |
| Distance | 135 ± 3 ly (41 ± 1 pc) |
| Details | |
| Mass | 0.83 ± 0.03[3] M☉ |
| Radius | 1.029 ± 0.004[3] R☉ |
| Luminosity | 1.208 ± 0.004[3] L☉ |
| Surface gravity (log g) | 4.31 ± 0.01[3] cgs |
| Temperature | 5907 ± 71[3] K |
| Age | 12.2 ± 0.8[3] Gyr |
| Other designations | |
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 12,200 million years old.[3] 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]
| 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
- ↑ 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
- 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 - 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.
- ↑ "HD 6434 -- High proper-motion Star". SIMBAD Astronomical Database. Centre de données astronomiques de Strasbourg. Retrieved 2014-09-08.
- ↑ "European Southern Observatory: Six Extrasolar Planets Discovered". SpaceRef Interactive Inc. 7 August 2000. Retrieved 15 August 2009.
- ↑ 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.
- ↑ 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.
External links
Coordinates: 
01h 04m 40.1511s, −39° 29′ 17.583″
This article is issued from Wikipedia - version of the 12/3/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.