HD 176051
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| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Lyra (constellation) |
| Right ascension | 18h 57m 01.6105s[1] |
| Declination | +32° 54′ 04.585″[1] |
| Apparent magnitude (V) | 5.22 |
| Characteristics | |
| Spectral type | F9V[2] (G0V/K1V)[3] |
| U−B color index | +0.029[4] |
| B−V color index | +0.570[4] |
| Variable type | Spectroscopic binary |
| Astrometry | |
| Radial velocity (Rv) | -47.2[5] km/s |
| Proper motion (μ) | RA: 202.86[1] mas/yr Dec.: −143.98[1] mas/yr |
| Parallax (π) | 66.76 ± 0.54[1] mas |
| Distance | 48.9 ± 0.4 ly (15.0 ± 0.1 pc) |
| Details | |
| Mass | 1.07/0.71[3] M☉ |
| Surface gravity (log g) | 4.60[6] |
| Temperature | 6,000[6] K |
| Metallicity | [Fe/H]=−0.11[6] |
| Age | 8.1 × 109[7] years |
| Other designations | |
HD 176051 is a spectroscopic binary star system[2] located approximately 49 light years away from Earth, in the constellation Lyra. The pair orbit with a period of 22,423 days (61.4 years) and an eccentricity of 0.25.[8] Compared to the Sun, they have a somewhat lower proportion of elements more massive than helium.[6] Their individual masses are estimated at 1.07 and 0.71 solar masses.[3]
[edit] Planetary system
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity |
|---|---|---|---|---|
| b | 1.5 ± 0.3 MJ | 1.76 | 1016 ± 40 | 0 |
The parent star is a binary star. The planet parameters are given for the 0.71 Solar mass B component (Muterspaugh et al. 2010). If the planet is orbiting the 1.07 Solar mass A component, the planet mass is 2.26 MJ and a = 2.02 AU.
[edit] References
- ^ a b c d e Perryman, M. A. C. et al. (1997), "The Hipparcos Catalogue", Astronomy & Astrophysics 323: L49–L52, Bibcode 1997A&A...323L..49P
- ^ a b c "Simbad Query Result: HD 176051 -- Spectroscopic binary". Simbad. Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HR+7162&submit=SIMBAD+search. Retrieved 2009-05-07.
- ^ a b c Muterspaugh, Matthew W. et al (2006). "Limits to tertiary astrometric companions in binary systems". The Astrophysical Journal 653 (2): 1469–1479. arXiv:astro-ph/0608640. Bibcode 2006ApJ...653.1469M. doi:10.1086/508743.
- ^ a b Rakos, K. D. et al (February 1982). "Photometric and astrometric observations of close visual binaries". Astronomy and Astrophysics Supplement Series 47: 221–235. Bibcode 1982A&AS...47..221R.
- ^ Wilson, R. E. (1953). Washington D.C.: Carnegie Institute. Bibcode 1953GCRV.
- ^ a b c d Luck, R. E.; Heiter, U. (2006). "Dwarfs in the local region". Astronomical Journal 131 (6): 3069–3092. Bibcode 2006AJ....131.3069L. doi:10.1086/504080.
- ^ Holmberg, J. et al (2007). "The Geneva-Copenhagen survey of the Solar neighbourhood. II. New uvby calibrations and rediscussion of stellar ages, the G dwarf problem, age-metallicity diagram, and heating mechanisms of the disk". Astronomy & Astrophysics 475: 519–537. arXiv:0707.1891. Bibcode 2007A&A...475..519H. doi:10.1051/0004-6361:20077221.
- ^ Pourbaix, D. et al (2004). SB9: The Ninth Catalogue of Spectroscopic Binary Orbits. 424. Bibcode 2009yCat....102020P.
- ^ Schneider, J. "Notes for star HD 176051 b". The Extrasolar Planets Encyclopaedia. http://www.exoplanet.eu/star.php?st=HD+176051. Retrieved 2010-10-22.
- http://www.exoplanet.eu/star.php?st=HD+176051#a_publi
- http://arxiv.org/PS_cache/arxiv/pdf/1010/1010.4048v1.pdf
- http://arxiv.org/abs/1010.4048
- http://iopscience.iop.org/1538-3881/140/6/1657
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