HD 188015 b
| Discovery | |
|---|---|
| Discovered by | Marcy et al. |
| Discovery site | United States |
| Discovery date | January 25, 2005 |
| Doppler spectroscopy | |
| Orbital characteristics | |
| Apastron | 1.368 AU (204,600,000 km) |
| Periastron | 1.038 AU (155,300,000 km) |
| 1.203 ± 0.070 AU (180,000,000 ± 10,500,000 km) | |
| Eccentricity | 0.137 ± 0.026 |
| 461.2 ± 1.7 d 1.263 y | |
Average orbital speed | 28.47 |
| 2,451,787 ± 17 | |
| 222° ± 10 | |
| Semi-amplitude | 37.6 ± 1.2 |
| Star | HD 188015 |
| Physical characteristics | |
| Mass | >1.50 ± 0.13 MJ |
HD 188015 b is an extrasolar planet announced by the California and Carnegie Planet Search team in 2005. Like majority of known planets, it was discovered using the radial velocity method.
The planet has a minimum mass of about 1.25 Jupiter masses. It orbits HD 188015 in a slightly eccentric orbit with a semi-major axis about 20% further than Earth's.
Stability analysis reveals that if Earth-sized planets existed at the Trojan points of HD 188015 b, their orbits would be stable for long periods of time.