Astronomy:HD 89307
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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[1] mas/yr Dec.: −39.333[1] mas/yr |
| Parallax (π) | 31.4134 ± 0.0226[1] mas |
| 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
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
- List of extrasolar planets
- List of stars in Leo
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 Harlan, E. A. (September 1969). "MK classifications for F- and G-type stars. I". Astronomical Journal 74: 916–919. doi:10.1086/110881. Bibcode: 1969AJ.....74..916H.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 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. doi:10.1088/0004-637X/703/2/1545. Bibcode: 2009ApJ...703.1545F.
- ↑ 5.0 5.1 5.2 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ "9 Cet". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=9+Cet.
- ↑ Boisse, Isabelle; Pepe, Francesco; Perrier, Christian; Queloz, Didier; Bonfils, Xavier; Bouchy, François; Santos, Nuno C.; Arnold, Luc et al. (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, doi:10.1051/0004-6361/201118419, Bibcode: 2012A&A...545A..55B
- ↑ 8.0 8.1 Xiao, Guang-Yao et al. (March 2023). "The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements". Research in Astronomy and Astrophysics.
External links
- "Notes for star HD 89307". Extrasolar Planets Encyclopaedia. http://exoplanet.eu/star.php?st=HD+89307. Retrieved 2008-08-18.
Coordinates: 
10h 18m 21.2877s, +12° 37′ 15.990″
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