From Wikipedia, the free encyclopedia
HD 150706
Observation data
Epoch J2000.0       Equinox J2000.0
Constellation Ursa Minor
Right ascension 16h 31m 17.5834s [1]
Declination +79° 47′ 23.1995″ [1]
Apparent magnitude (V) 7.016 [2]
Characteristics
Evolutionary stage main sequence
Spectral type G0V [3]
Astrometry
Radial velocity (Rv)−17.13 [1] km/s
Proper motion (μ) RA: 94.884±0.046 [1]  mas/ yr
Dec.: −86.971±0.055 [1]  mas/ yr
Parallax (π)35.3446 ± 0.0284  mas [1]
Distance92.28 ± 0.07  ly
(28.29 ± 0.02  pc)
Details
Mass1.04 [4]  M
Radius0.99 [1]  R
Luminosity1.076 [1]  L
Surface gravity (log g)4.47 [4]  cgs
Temperature5,921 [1]  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 [5]
Database references
SIMBAD data

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.

Distance to the star, 92 light years, 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 on the northern hemisphere except for near the equator. Likewise, it is never visible in most of the southern hemisphere.

The existence of an extrasolar planet orbiting this star was announced at the Scientific Frontiers in Research on Extrasolar Planets conference in 2002 [1]. 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 the planet, [6] and the planet does not appear in the current web version of the Catalog of Nearby Exoplanets. [2] But another planet was discovered in system in 2012; this Jupiter-twin completes one orbit in roughly 16 years. Its eccentricity and orbit is very poorly constrained. [3]

The HD 150706 planetary system [3]
Companion
(in order from star)
Mass Semimajor axis
( AU)
Orbital period
( days)
Eccentricity Inclination Radius
b >2.71+1.14
−0.66
  MJ
6.7+4.0
−1.4
5894+5584
−1498
0.38+0.28
−0.32

See also

References

  1. ^ a b c d e f g h i 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.
  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. ^ a b c 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. ^ a b c d 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. ^ "HD 150706". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-11-17.
  6. ^ 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.

External links