14 Andromedae b
Radial velocity changes over time of 14 Andromedae caused by the orbit of 14 Andromedae b. | |
| Discovery | |
|---|---|
| Discovered by | Sato et al. |
| Discovery site | Okayama Planet Search Program |
| Discovery date | July 2, 2008 |
| Doppler Spectroscopy | |
| Designations | |
Named after | "spe" from latin "spes" meaning hope |
| Spe | |
| Orbital characteristics | |
| 0.775 AU (115,900,000 km) | |
| Eccentricity | 0.0094 |
| 186.76+0.11 −0.12 d | |
| 2452853.0±2.1 | |
| Semi-amplitude | 86.08+2.76 −2.95 m/s |
| Star | 14 Andromedae |
| Physical characteristics | |
| Mass | ≥3.559+0.114 −0.122 MJ |
14 Andromedae b (abbreviated 14 And b), formally named Spe /ˈspiː/, is a candidate exoplanet approximately 248 light-years away in the constellation of Andromeda.
The 186-day period planet orbits about 83% the Earth-Sun distance from the giant star 14 Andromedae. It has a minimum mass of 3.559 times the mass of Jupiter. The planet orbits with an eccentricity of 0.0094, which means the orbital distance over the course of its revolution varies by only 0.02 AU.