HD 89307 is a star in the equatorial constellation of Leo. It is too faint to be viewed with the naked eye except under ideal conditions, having an apparent visual magnitude of 7.02.[2] The star is located at a distance of 104 light-years (32 parsecs) from the Sun based on parallax, and is drifting further away with a radial velocity of +23 km/s.[1]

This is an ordinary G-type main-sequence star with a stellar classification of G0V.[3] It is chromospherically inactive and appears older than the Sun with a rotation period of 23.7 days.[4] The star has about the same mass[4] as the Sun and is 8% larger. It is radiating 1.35[5] times the Sun's luminosity from its photosphere at an effective temperature of 5,950 K.[4]

Planetary system

In December 2004, using the radial velocity method, it was found to have a long-period giant planet in orbit around it.[4] The parameters of HD 89307 b were updated in 2012,[7] and in 2023 its inclination and true mass were determined via astrometry.[8]

The HD 89307 planetary system[8]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(years) 		Eccentricity Inclination Radius
b 2.02+0.27
−0.15 MJ 		3.331+0.052
−0.053 		5.991+0.081
−0.078 		0.174+0.041
−0.043 		72+13
−15 or 108+15
−13° 		—

See also

References

  1. ^ a b c d e f 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. ^ a b c d e 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. S2CID 119257644.
  3. ^ a b Harlan, E. A. (September 1969). "MK classifications for F- and G-type stars. I". Astronomical Journal. 74: 916–919. Bibcode:1969AJ.....74..916H. doi:10.1086/110881.
  4. ^ a b c d e f g Fischer, Debra; et al. (2009). "Five planets and an independent confirmation of HD 196885 Ab from Lick Observatory". The Astrophysical Journal. 703 (2): 1545–1556. arXiv:0908.1596. Bibcode:2009ApJ...703.1545F. doi:10.1088/0004-637X/703/2/1545. S2CID 15524804.
  5. ^ a b c 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. ^ "9 Cet". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-03-27.
  7. ^ 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
  8. ^ a b Xiao, Guang-Yao; Liu, Yu-Juan; et al. (March 2023). "The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements". Research in Astronomy and Astrophysics. 23 (5). arXiv:2303.12409. Bibcode:2023RAA....23e5022X. doi:10.1088/1674-4527/accb7e.


Allikas: https://en.wikipedia.org/wiki/HD_89307
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