Astronomy:HD 176051

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Short description: Spectroscopic binary star system in the constellation of Lyra
HD 176051
Observation data
Equinox J2000.0]] (ICRS)
Constellation Lyra
Right ascension  18h 57m 01.60985s[1]
Declination +32° 54′ 04.5723″[1]
Apparent magnitude (V) 5.22
Characteristics
Spectral type G0 V + K1 V[2]
U−B color index +0.029[3]
B−V color index +0.570[3]
Astrometry
Radial velocity (Rv)−47.2[4] km/s
Proper motion (μ) RA: +201.96[1] mas/yr
Dec.: −145.46[1] mas/yr
Parallax (π)67.24 ± 0.37[1] mas
Distance48.5 ± 0.3 ly
(14.87 ± 0.08 pc)
Absolute magnitude (MV)4.34[5]
Orbit[6]
Period (P)22,423 d
Semi-major axis (a)19.1 AU[7]
Eccentricity (e)0.25 (0.27[7] or 0.54[8])
Argument of periastron (ω)
(secondary)		102°
Semi-amplitude (K1)
(primary)		3.51 km/s
Semi-amplitude (K2)
(secondary)		0.74 km/s
Details
HD 176051 A
Mass1.07[2] M☉
Radius1.06[9] R☉
Luminosity1.65[5] L☉
Surface gravity (log g)4.60[10] cgs
Temperature6,000[10] K
Metallicity [Fe/H]−0.11[10] dex
Age8.1[11] Gyr
HD 176051 B
Mass0.71[2] M☉
Radius0.81[9] R☉
Other designations
ADS 11871, HR 7162, BD+32°3267, GJ 738, HD 176051, LTT 15567, SAO 67612, HIP 93017.[12]
Database references
SIMBADAB
A
B
Exoplanet Archivedata
ARICNSdata
data2
Extrasolar Planets
Encyclopaedia		data

HD 176051 is a spectroscopic binary star system[12] 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.[6] Compared to the Sun, they have a somewhat lower proportion of elements more massive than helium.[10] Their individual masses are estimated at 1.07 and 0.71 solar masses (M☉).[2] The system is moving closer to the Sun with a radial velocity of −47[4] km/s and will reach perihelion in about 269,000 years when it comes within roughly 17 ly (5.1 pc) of the Sun.[13]

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.

The HD 176051 planetary system[14]
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 planet parameters are given here for the 0.71 M☉ component B.[7] But, if instead the planet is orbiting the 1.07 M☉ component A, its mass is 2.26 |♃|J}}}}}} with a semimajor axis of 2.02 AU.[14]

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V. 
  2. ↑ 2.0 2.1 2.2 2.3 Muterspaugh, Matthew W. (2006). "Limits to tertiary astrometric companions in binary systems". The Astrophysical Journal 653 (2): 1469–1479. doi:10.1086/508743. Bibcode: 2006ApJ...653.1469M. 
  3. ↑ 3.0 3.1 Rakos, K. D. (February 1982). "Photometric and astrometric observations of close visual binaries". Astronomy and Astrophysics Supplement Series 47: 221–235. Bibcode: 1982A&AS...47..221R. 
  4. ↑ 4.0 4.1 Wilson, R. E. (1953). "General Catalogue of Stellar Radial Velocities". Carnegie Institute Washington D.C. Publication (Washington D.C.: Carnegie Institute). Bibcode: 1953GCRV..C......0W. 
  5. ↑ 5.0 5.1 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A. VizieR
  6. ↑ 6.0 6.1 Pourbaix, D. et al. (2004), "SB9: The Ninth Catalogue of Spectroscopic Binary Orbits", Astronomy & Astrophysics 424: 727–732, doi:10.1051/0004-6361:20041213, Bibcode: 2004A&A...424..727P. VizierR (obsoleted)
  7. ↑ 7.0 7.1 7.2 Muterspaugh, Matthew W.; Lane, Benjamin F. et al. (2010). "The PHASES Differential Astrometry Data Archive. V. Candidate Substellar Companions to Binary Systems". The Astronomical Journal 140 (6): 1657–1671. doi:10.1088/0004-6256/140/6/1657. Bibcode: 2010AJ....140.1657M. "The substellar object is a planet 1.5 ± 0.3 times the mass of Jupiter, assuming a distance of 15 pc and a stellar mass of 0.71 M☉...". 
  8. ↑ Simonetti, Paolo et al. (2020). "Statistical Properties of Habitable Zones in Stellar Binary Systems". The Astrophysical Journal 903 (2): 141. doi:10.3847/1538-4357/abc074. Bibcode: 2020ApJ...903..141S. 
  9. ↑ 9.0 9.1 Johnson, H. M. et al. (1983). "Predicted infrared brightness of stars within 25 parsecs of the sun". The Astrophysical Journal Supplement Series 53: 643. doi:10.1086/190905. Bibcode: 1983ApJS...53..643J. "VizieR−GJ 738A/738B"
  10. ↑ 10.0 10.1 10.2 10.3 Luck, R. E.; Heiter, U. (2006). "Dwarfs in the local region". Astronomical Journal 131 (6): 3069–3092. doi:10.1086/504080. Bibcode: 2006AJ....131.3069L. 
  11. ↑ Holmberg, J. (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 (2): 519–537. doi:10.1051/0004-6361:20077221. Bibcode: 2007A&A...475..519H. 
  12. ↑ 12.0 12.1 "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. 
  13. ↑ Bailer-Jones, C. A. L. (March 2015), "Close encounters of the stellar kind", Astronomy & Astrophysics 575: 13, doi:10.1051/0004-6361/201425221, A35, Bibcode: 2015A&A...575A..35B. 
  14. ↑ 14.0 14.1 Schneider, J (1995). "Notes for star HD 176051 b". Extrasolar Planets Encyclopaedia. https://exoplanet.eu/catalog/hd_176051_b--752/. Retrieved 2010-10-22. 

External links



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