| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Leo |
| Right ascension | 10 18 21.28771 |
| Declination | +12° 37′ 15.9909″ |
| Apparent magnitude (V) | 7.02 |
| Characteristics | |
| Spectral type | G0V |
| B−V color index | 0.594±0.003 |
| Astrometry | |
| Radial velocity (Rv) | +23.27±0.13 km/s |
| Proper motion (μ) | RA: −272.659 mas/yr Dec.: −39.333 mas/yr |
| Parallax (π) | 31.4134 ± 0.0226 mas |
| Distance | 103.83 ± 0.07 ly (31.83 ± 0.02 pc) |
| Absolute magnitude (MV) | 4.57 |
| Details | |
| Mass | 1.028±0.04 M☉ |
| Radius | 1.08+0.01 −0.02 R☉ |
| Luminosity | 1.354±0.003 L☉ |
| Surface gravity (log g) | 4.414±0.10 cgs |
| Temperature | 5,950±44 K |
| Metallicity | −0.15±0.02 dex |
| Rotation | 23.7 d |
| Rotational velocity (v sin i) | 3.21±0.50 km/s |
| Age | 5.3+2.7 −2.9 Gyr 6.76 Gyr |
| Other designations | |
| BD+13 2237, GC 14140, HD 1835, HIP 50473, SAO 99049, PPM 127289 | |
| 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. 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.
This is an ordinary G-type main-sequence star with a stellar classification of G0V. It is chromospherically inactive and appears older than the Sun with a rotation period of 23.7 days. The star has about the same mass as the Sun and is 8% larger. It is radiating 1.35 times the Sun's luminosity from its photosphere at an effective temperature of 5,950 K.
Planetary system
In December 2004, using the radial velocity method, it was found to have a long-period giant planet in orbit around it. The parameters of HD 89307 b were updated in 2012, and in 2023 its inclination and true mass were determined via astrometry.
| 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
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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
- ^ 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.
External links
- "Notes for star HD 89307". Extrasolar Planets Encyclopaedia. Archived from the original on November 6, 2007. Retrieved 2008-08-18.
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