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 | |
| 1.16 times jupiters | |
| Mass | ≥3.559+0.114 −0.122 MJ |
Mean density | 0.7217 g/cm^3 |
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 4.8 times the mass of Jupiter. And a estimated radius of 1.16 times 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.