| 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. | |
| Detection method | Radial velocity | |
| Discovery site | Keck Observatory | |
| Discovery status | Published | |
| Other designations | ||
|
HD 134987 b
|
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| Database references | ||
| Extrasolar Planets Encyclopaedia |
data | |
| SIMBAD | 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]
Coordinates: 15h 13m 28s, −25° 18′ 33″
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