astro.wikisort.org - Star
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 105 light years from the Sun based on parallax, and is drifting further away with a radial velocity of +23 km/s.[1]
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Leo |
| Right ascension | 10h 18m 21.28741s[1] |
| Declination | +12° 37′ 15.9920″[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) | +23.29±0.19[1] km/s |
| Proper motion (μ) | RA: −272.380[1] mas/yr Dec.: −39.416[1] mas/yr |
| Parallax (π) | 31.2110 ± 0.0511 mas[1] |
| Distance | 104.5 ± 0.2 ly (32.04 ± 0.05 pc) |
| Absolute magnitude (MV) | 4.57[4] |
| Details[4] | |
| Mass | 1.028±0.04 M☉ |
| Radius | 1.08+0.01 −0.02[1] R☉ |
| Luminosity | 1.354±0.003[1] 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 |
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[1] 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]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥2.00 ± 0.42 MJ | 3.34 ± 0.17 | 2,199 ± 61 | 0.25 ± 0.09 | — | — |
See also
- List of extrasolar planets
References
- 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.
- 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.
- "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
External links
- "Notes for star HD 89307". The Extrasolar Planets Encyclopaedia. Retrieved 2008-08-18.
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На других языках
[de] HD 89307
HD 89307 ist ein 107,65 Lichtjahre von der Erde entfernter Gelber Zwerg mit einer Rektaszension von 10h 18m 21s und einer Deklination von +12° 37' 15". Er besitzt eine scheinbare Helligkeit von ca. 7 mag. Im Jahre 2004 entdeckte Geoffrey Marcy einen extrasolaren Planeten, der diesen Stern umkreist. Dieser trägt den Namen HD 89307 b.- [en] HD 89307
[es] HD 89307
HD 89307 (HIP 50473)[1] es una estrella en la constelación de Leo de magnitud aparente +7,06. Se encuentra a 106 años luz de distancia del Sistema Solar. En 2004 se anunció el descubrimiento de un planeta extrasolar en órbita alrededor de esta estrella.Текст в блоке "Читать" взят с сайта "Википедия" и доступен по лицензии Creative Commons Attribution-ShareAlike; в отдельных случаях могут действовать дополнительные условия.
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