HD 176051
| 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] |
| 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] cgs |
| Temperature | 6,000[6] K |
| Metallicity [Fe/H] | −0.11[6] dex |
| Age | 8.1[7] Gyr |
| Other designations | |
HD 176051 is a spectroscopic binary star system[2] 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 (M☉).[3]
Planetary system
A planet orbiting one of the stars was discovered through astrometric observations. However, it is not known which stellar component the planet is orbiting around.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| 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 M☉ component B (Muterspaugh et al. 2010). If the planet is orbiting the 1.07 M☉ component A, its mass is 2.26 MJ and a = 2.02 AU.
References
- 1 2 3 4 5 Perryman, M. A. C.; et al. (1997), "The Hipparcos Catalogue", Astronomy & Astrophysics 323: L49–L52, Bibcode:1997A&A...323L..49P
- 1 2 3 "Simbad Query Result: HD 176051 -- Spectroscopic binary". Simbad. Centre de Données astronomiques de Strasbourg. Retrieved 2009-05-07.
- 1 2 3 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.
- 1 2 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). Publication 601, General Catalogue of Stellar Radial Velocities. Washington D.C.: Carnegie Institute. Bibcode:1953GCRV.
- 1 2 3 4 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. Astronomy & Astrophysics 424. Bibcode:2009yCat....102020P.
- ↑ Schneider, J. "Notes for star HD 176051 b". The Extrasolar Planets Encyclopaedia. Retrieved 2010-10-22.
External links
- HD 176051 b on The Extrasolar Planets Encyclopaedia
- Candidate substellar companions of binary systems
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