| Gamma Cephei Ab |
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| cepheus constellation | |
| extrasolar planets | |
Gamma Cephei Ab is an Extrasolar Planet orbiting Gamma Cephei A every two years. DISCOVERY In 1989 , the planet was announced by Anthony Lawton and P. Wright . This would have been the first confirmed Extrasolar Planet , and it was hypothesized based on the same Radial Velocity technique later used successfully by others. However, the claim was retracted in 1992 due to the quality of the data not being good enough to make a solid discovery. But on September 24 2002 , Gamma Cephei Ab was final confirmed. The team of astronomers (including William D. Cochran , Artie P. Hatzes ... etc.) at the Planetary Systems and their Formation Workshop announced the preliminary confirmation of a long-suspected planet Gamma Cephei Ab with a minimum mass of 1.76 that of Jupiter . ORBIT AND MASS Gamma Cephei moves between 1.7 and 2.5 AUs in orbital distance around Gamma Cephei A , with an average separation of around 1.8 AUs, which would be between the orbital distance of Earth and Mars in the Solar System . It's orbit is eccentric by 0.19 and takes 2.47 years to complete. SEE ALSO EXTERNAL LINKS
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