HD 150706

HD 150706 is a 7th magnitude star in the constellation of Ursa Minor. It is a remarkably Sun-like yellow dwarf (spectral type G0V) being only 6% less massive than the Sun.

HD 150706
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Ursa Minor
Right ascension 16h 31m 17.58304s[1]
Declination +79° 47′ 23.1976″[1]
Apparent magnitude (V) 7.016[2]
Characteristics
Evolutionary stage main sequence
Spectral type G0V[3]
Astrometry
Radial velocity (Rv)−17.27±0.13[1] km/s
Proper motion (μ) RA: 94.947 mas/yr[1]
Dec.: −86.853 mas/yr[1]
Parallax (π)35.4827 ± 0.0135 mas[1]
Distance91.92 ± 0.03 ly
(28.18 ± 0.01 pc)
Details
Mass1.04[4] M☉
Radius0.99[5] R☉
Luminosity1.076[5] L☉
Surface gravity (log g)4.47[4] cgs
Temperature5,921[5] K
Metallicity [Fe/H]−0.07[4] dex
Age1.59[4] Gyr
Other designations
BD+80°519, GJ 632, HIP 80902, SAO 8557, TYC 4575-1336-1[6]
Database references
SIMBADdata

The distance to the star, 91.9 light-years (28.2 parsecs), is enough that it is not visible to the unaided eye. However, it is an easy target for binoculars. It is located only about 10° from the northern celestial pole so it is always visible in the northern hemisphere except for near the equator. Likewise, it is never visible in most of the southern hemisphere.

The existence of an exoplanet orbiting this star was announced at the Scientific Frontiers in Research on Extrasolar Planets conference in 2002.[7] The claimed planet had a minimum mass equal to the mass of Jupiter and was thought to be located in an elliptical orbit with a period of 264 days. However independent measurements of the star failed to confirm the existence of this planet.[8]

A different planet was discovered in the system in 2012; this Jupiter-twin completes one orbit in roughly 16 years. Its eccentricity and orbit is very poorly constrained.[3] In 2023, the inclination and true mass of HD 150706 b were determined via astrometry, and its orbit was revised, finding a substantially wider but still poorly constrained orbit with a period of about 36 years.[9]

The HD 150706 planetary system[9]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(years)		 Eccentricity Inclination Radius
b 2.43+0.48
−0.38 MJ		 11.5+5.0
−2.4		 36.0+26.0
−11.0		 0.787+0.076
−0.083		 70+14
−17 or 110+17
−14°		 —

See also

References
  1. Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27. Bibcode:2000A&A...355L..27H.
  3. Boisse, Isabelle; Pepe, Francesco; Perrier, Christian; Queloz, Didier; Bonfils, Xavier; Bouchy, François; Santos, Nuno C.; Arnold, Luc; Beuzit, Jean-Luc; Dìaz, Rodrigo F.; Delfosse, Xavier; Eggenberger, Anne; Ehrenreich, David; Forveille, Thierry; Hébrard, Guillaume; Lagrange, Anne-Marie; Lovis, Christophe; Mayor, Michel; Moutou, Claire; Naef, Dominique; Santerne, Alexandre; Ségransan, Damien; Sivan, Jean-Pierre; Udry, Stéphane (2012), "The SOPHIE search for northern extrasolar planets V. Follow-up of ELODIE candidates: Jupiter-analogs around Sun-like stars", Astronomy and Astrophysics, 545: A55, arXiv:1205.5835, Bibcode:2012A&A...545A..55B, doi:10.1051/0004-6361/201118419, S2CID 119109836
  4. Aguilera-Gómez, Claudia; Ramírez, Iván; Chanamé, Julio (2018). "Lithium abundance patterns of late-F stars: An in-depth analysis of the lithium desert". Astronomy and Astrophysics. 614: A55. arXiv:1803.05922. Bibcode:2018A&A...614A..55A. doi:10.1051/0004-6361/201732209. S2CID 62799777.
  5. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  6. "HD 150706". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-11-17.
  7. Udry, S.; Mayor, M.; Queloz, D. (2003). "Extrasolar Planets: from Individual Detections to Statistical Properties". Scientific Frontiers in Research on Extrasolar Planets, ASP Conference Series, Vol 294, Edited by Drake Deming and Sara Seager. San Francisco: ASP. pp. 17–26. Bibcode:2003ASPC..294...17U. ISBN 1-58381-141-9.
  8. Wright, J.T.; Marcy, G.W.; Fischer, D.A.; Butler, R.P.; Vogt, S.S.; Tinney, C.G.; Jones, H.R.A.; Carter, B.D.; Johnson, J.A.; McCarthy, C.; Apps, K. (2007). "Four New Exoplanets and Hints of Additional Substellar Companions to Exoplanet Host Stars". The Astrophysical Journal. 657 (1): 533–45. arXiv:astro-ph/0611658. Bibcode:2007ApJ...657..533W. doi:10.1086/510553. S2CID 35682784.
  9. Xiao, Guang-Yao; Liu, Yu-Juan; et al. (May 2023). "The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements". Research in Astronomy and Astrophysics. 23 (5): 055022. arXiv:2303.12409. Bibcode:2023RAA....23e5022X. doi:10.1088/1674-4527/accb7e.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.