23 Librae b
Extrasolar planet in the constellation Libra
From Wikipedia, the free encyclopedia
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.[1][2][3]
DiscoverydateNovember 1, 1999
23 Librae b (min mass ~1.59 MJ) as seen with Celestia | |
| Discovery[1][2] | |
|---|---|
| Discovered by | California and Carnegie Planet Search |
| Discovery site | W. M. Keck Observatory |
| Discovery date | November 1, 1999 |
| Doppler spectroscopy | |
| Orbital characteristics | |
| 0.81 ± 0.02 AU (121,200,000 ± 3,000,000 km) | |
| Eccentricity | 0.233 ± 0.002 |
| 258.19 ± 0.07 d 0.7069 y | |
| 2,450,331.7 ± 2.2 | |
| 358.3 ± 3.7 | |
| Semi-amplitude | 49.52 ± 0.57 |
| Star | 23 Librae |
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.[4]
