23 Librae b
| Exoplanet | List of exoplanets | |
|---|---|---|
| Parent star | ||
| Star | 23 Librae | |
| Constellation | Libra | |
| Right ascension | (α) | 15h 13m 28s |
| Declination | (δ) | –25° 18′ 33″ |
| Apparent magnitude | (mV) | 6.45 |
| Distance | 83.7 ly (25.6 pc) | |
| Mass | (m) | 1.05 M☉ |
| Radius | (r) | 1.2 R☉ |
| Temperature | (T) | 5559 K |
| Metallicity | [Fe/H] | 0.23 |
| Age | 7.32 Gyr | |
| Orbital elements | ||
| Semi-major axis | (a) | 0.81 ± 0.02 AU |
| Eccentricity | (e) | 0.233 ± 0.002 |
| Orbital period | (P) | 258.19 ± 0.07 d (0.7069 y) |
| Argument of periastron |
(ω) | 358.3 ± 3.7° |
| Time of periastron | (T0) | 2,450,331.7 ± 2.2 JD |
| Semi-amplitude | (K) | 49.52 ± 0.57 m/s |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 1.59 ± 0.02 MJ |
| Discovery information | ||
| Discovery date | November 1, 1999[1] | |
| Discoverer(s) | Vogt et al.[2] | |
| Discovery method | Radial velocity | |
| Discovery site | Keck Observatory[1] | |
| Discovery status | Published[2] | |
| Other designations | ||
HD 134987 b | ||
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
23 Librae b (23 Lib b) is an extrasolar Jovian planet discovered in November 1999 orbiting the star 23 Librae. It orbits in its star's habitable zone.[1][2][3]
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 AUs, which is between that of Venus and the Earth in the Solar System.[4]
References
- 1 2 3 "Astronomers discover six new planets orbiting nearby stars" (Press release). Kamuela, Hawaii: W. M. Keck Observatory. November 1, 1999. Retrieved December 19, 2017.
- 1 2 3 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.
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