HD 89307
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| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Leo |
| Right ascension | 10h 18m 21.28771s[1] |
| Declination | +12° 37′ 15.9909″[1] |
| Apparent magnitude (V) | 7.02[2] |
| Characteristics | |
| Spectral type | G0V[3] |
| B−V color index | 0.594±0.003[2] |
| Astrometry | |
| Radial velocity (Rv) | +23.27±0.13[1] km/s |
| Proper motion (μ) | RA: −272.659 mas/yr[1] Dec.: −39.333 mas/yr[1] |
| Parallax (π) | 31.4134 ± 0.0226 mas[1] |
| Distance | 103.83 ± 0.07 ly (31.83 ± 0.02 pc) |
| Absolute magnitude (MV) | 4.57[4] |
| Details[4] | |
| Mass | 1.028±0.04 M☉ |
| Radius | 1.08+0.01 −0.02[5] R☉ |
| Luminosity | 1.354±0.003[5] L☉ |
| Surface gravity (log g) | 4.414±0.10 cgs |
| Temperature | 5,950±44 K |
| Metallicity [Fe/H] | −0.15±0.02[2] dex |
| Rotation | 23.7 d |
| Rotational velocity (v sin i) | 3.21±0.50 km/s |
| Age | 5.3+2.7 −2.9 Gyr[2] 6.76[4] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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[edit]
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]
| 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[edit]
References[edit]
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ "9 Cet". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-03-27.
- ^ 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
- ^ 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. arXiv:2303.12409.
External links[edit]
- "Notes for star HD 89307". Extrasolar Planets Encyclopaedia. Archived from the original on November 6, 2007. Retrieved 2008-08-18.
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