Astronomy:HD 89307 b
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Short description: Exoplanet orbiting the star HD 89307 in the constellation of Leo
| Discovery[1][2] | |
|---|---|
| Discovered by | Butler et al. Fischer et al. |
| Discovery site | United States |
| Discovery date | December 26, 2004 |
| radial velocity | |
| Orbital characteristics[3] | |
| 3.331+0.052 −0.053 astronomical unit|AU | |
| Eccentricity | 0.174+0.041 −0.043 |
| Orbital period | 2188+30 −28 d 5.991+0.081 −0.078 yr |
| Average Orbital speed | 16.6 |
| Inclination | 72°+13° −15° or 108°+15° −13° |
| Longitude of ascending node | 151+20 −133 |
| astron|astron|helion}} | 2456758±96 |
| 22+320 −14 | |
| Semi-amplitude | 31.0 ± 4.9 |
| Star | HD 89307 |
| Physical characteristics[3] | |
| Mass | 2.02+0.27 −0.15 Jupiter mass |
HD 89307 b is an exoplanet orbiting the star HD 89307 located approximately 104 light-years away in the constellation of Leo. The planet takes roughly 2164 days or 5.9 years to orbit its star. The planet's minimum mass is 1.92 |♃|J}}}}}}; initially, the true mass could not be determined since the inclination was unknown. As is common for many long-period exoplanets, the eccentricity is greater than any planets in the Solar System, orbiting at an average distance of 3.28 AU. The speed of the wobble caused by the planet's gravity is 31 meters per second. The average orbital velocity is 16.6 m/s.[1] In 2023, the inclination and true mass of HD 89307 b were determined via astrometry.[3]
References
- ↑ 1.0 1.1 Butler et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal 646 (1): 505–522. doi:10.1086/504701. Bibcode: 2006ApJ...646..505B. http://www.iop.org/EJ/article/0004-637X/646/1/505/64046.html. Retrieved 2009-03-11.
- ↑ 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.
- ↑ 3.0 3.1 3.2 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 planet HD 89307 b". Extrasolar Planets Encyclopaedia. https://exoplanet.eu/catalog/hd_89307_b--239/. Retrieved 2008-08-18.
- "HD 89307". Exoplanets. http://media4.obspm.fr/exoplanets/base/etoile.php?nom=HD+89307. Retrieved 2008-08-18.
Coordinates: 
10h 18m 21.2877s, +12° 37′ 15.990″
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