HD 188015 b Extrasolar planet in the constellation Vulpecula
HD 188015 b Discovered by Marcy et al. [ 1] Discovery site United States Discovery date January 25, 2005 Doppler spectroscopy 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 y 28.47 2,451,787 ± 17 222° ± 10 Semi-amplitude 37.6 ± 1.2 Star HD 188015 Mass >1.50 ± 0.13 M J
HD 188015 b is an extrasolar planet announced by the California and Carnegie Planet Search team in 2005.[ 1] 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.[ 2]
