23 Librae b
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
 | ||
| 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 | ||
| Semimajor axis | (a) | 0.81 ± 0.02 AU (120 Gm) |
| Periastron | (q) | 0.62 AU (92 Gm) |
| Apastron | (Q) | 0.99 AU (149 Gm) |
| 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 14, 1999 | |
| Discoverer(s) | Vogt et al. | |
| Discovery method | Radial velocity | |
| Discovery site | Keck Observatory | |
| Discovery status | Published | |
| 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 1999 orbiting the star 23 Librae. It orbits in its star's habitable zone.[1][2]
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.[3]
References
- ↑ 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.
Coordinates: 
15h 13m 28s, −25° 18′ 33″
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