HD 176051

Last updated
HD 176051
Observation data
Epoch J2000       Equinox J2000
Constellation Lyra [1]
Right ascension 18h 57m 01.60985s [2]
Declination +32° 54′ 04.5723″ [2]
Apparent magnitude  (V)5.20 [1]
Characteristics
Spectral type G0 V + K1 V [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: +201.96 [2] mas/yr
Dec.: −145.46 [2] mas/yr
Parallax (π)67.24±0.37  mas [2]
Distance 48.5 ± 0.3  ly
(14.87 ± 0.08  pc)
Absolute magnitude  (MV)4.34 [1]
Orbit
Period (P)61.4178±0.0633 [6] years
Semi-major axis (a)19.1 AU [7]
Eccentricity (e)0.262±0.003 [6]
Inclination (i)114.2±0.2 [6] °
Longitude of the node (Ω)48.3±0.2 [6] °
Periastron epoch (T)1972.19±0.07 [6]
Argument of periastron (ω)
(secondary)		281.6±0.3 [6] °
Semi-amplitude (K1)
(primary)		3.51 [8]  km/s
Semi-amplitude (K2)
(secondary)		0.74 [8]  km/s
Details
HD 176051 A
Mass 1.07 [3]   M☉
Radius 1.06 [9]   R☉
Luminosity 1.65 [1]   L☉
Surface gravity (log g)4.60 [10]   cgs
Temperature 6,000 [10]   K
Metallicity [Fe/H]−0.11 [10]   dex
Age 8.1 [11]   Gyr
HD 176051 B
Mass 0.71 [3]   M☉
Radius 0.81 [9]   R☉
Other designations
ADS 11871, HR 7162, BD+32°3267, GJ 738, HD 176051, LTT 15567, SAO 67612, HIP 93017 [12]
Database references
SIMBAD AB
A
B
Exoplanet Archive data
ARICNS data
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. [8] 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☉). [3] The system is moving closer to the Sun with a radial velocity of −47 [5]  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]

Contents

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 1.761016 ± 400——

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 MJ with a semimajor axis of 2.02 AU. [14]

See also

References

  1. 1 2 3 4 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters . 38 (5): 331. arXiv: 1108.4971 . Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. XHIP record for this object at VizieR.
  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. S2CID   18759600.
  3. 1 2 3 4 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. S2CID   15218103.
  4. 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.
  5. 1 2 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.
  6. 1 2 3 4 5 6 Izmailov, Igor; Khovritchev, Maxim (January 2025). "New Orbital Parameters of 850 Wide Visual Binary Stars and Their Statistical Properties". Research in Astronomy and Astrophysics. 25 (1): 015016. Bibcode:2025RAA....25a5016I. doi:10.1088/1674-4527/ad9da3. ISSN   1674-4527.
  7. 1 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. arXiv: 1010.4048 . Bibcode:2010AJ....140.1657M. doi: 10.1088/0004-6256/140/6/1657 . 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. 1 2 3 Pourbaix, D.; et al. (2004), "SB9: The Ninth Catalogue of Spectroscopic Binary Orbits", Astronomy & Astrophysics, 424: 727–732, arXiv: astro-ph/0406573 , Bibcode:2004A&A...424..727P, doi:10.1051/0004-6361:20041213, S2CID   119387088. VizierR (obsoleted)
  9. 1 2 Johnson, H. M.; et al. (1983). "Predicted infrared brightness of stars within 25 parsecs of the sun". The Astrophysical Journal Supplement Series. 53: 643. Bibcode:1983ApJS...53..643J. doi: 10.1086/190905 ."VizieR−GJ 738A/738B"
  10. 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 .
  11. ↑ 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 (2): 519–537. arXiv: 0707.1891 . Bibcode:2007A&A...475..519H. doi:10.1051/0004-6361:20077221. S2CID   119054949.
  12. 1 2 "Simbad Query Result: HD 176051 -- Spectroscopic binary". Simbad. Centre de Données astronomiques de Strasbourg . Retrieved 2009-05-07.
  13. ↑ Bailer-Jones, C. A. L. (March 2015), "Close encounters of the stellar kind", Astronomy & Astrophysics, 575: 13, arXiv: 1412.3648 , Bibcode:2015A&A...575A..35B, doi:10.1051/0004-6361/201425221, S2CID   59039482, A35.
  14. 1 2 Schneider, J (1995). "Notes for star HD 176051 b". Extrasolar Planets Encyclopaedia . Retrieved 2010-10-22.
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