 23 Librae b (min mass ~1.59 MJ) as seen with Celestia | |
| Discovery | |
|---|---|
| Discovered by | California and Carnegie Planet Search |
| Discovery site | W. M. Keck Observatory |
| Discovery date | November 1, 1999 |
| Detection method | Doppler spectroscopy |
| Orbital characteristics | |
| Semi-major axis | 0.81 ± 0.02 AU (121,200,000 ± 3,000,000 km) |
| Eccentricity | 0.233 ± 0.002 |
| Orbital period (sidereal) | 258.19 ± 0.07 d 0.7069 y |
| Time of periastron | 2,450,331.7 ± 2.2 |
| Argument of periastron | 358.3 ± 3.7 |
| Semi-amplitude | 49.52 ± 0.57 |
| Star | 23 Librae |
23 Librae b (23 Lib b), also known as HD 134987 b, is an extrasolar Jovian planet discovered in November 1999 orbiting the star 23 Librae. It orbits in its star's habitable zone.
As of 1999, the planet was known to have at least 1.5 times Jupiter's mass. The planet orbits 23 Librae at an average distance of 0.82 AU, which is between that of Venus and the Earth in the Solar System.
See also
References
- ^ "Astronomers discover six new planets orbiting nearby stars" (Press release). Kamuela, Hawaii: W. M. Keck Observatory. November 1, 1999. Retrieved December 19, 2017.
- ^ Vogt, Steven S.; et al. (2000). "Six New Planets from the Keck Precision Velocity Survey". The Astrophysical Journal. 536 (2): 902–914. arXiv:astro-ph/9911506. Bibcode:2000ApJ...536..902V. doi:10.1086/308981.
- Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701.
- Jones, Hugh R. A.; et al. (2010). "A long-period planet orbiting a nearby Sun-like star". Monthly Notices of the Royal Astronomical Society. 403 (4): 1703–1713. arXiv:0912.2716. Bibcode:2010MNRAS.403.1703J. doi:10.1111/j.1365-2966.2009.16232.x.
| 23 Librae system | |
|---|---|
| Stars | |
| Planets | |
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