HD 217107 b [SEP] constellation
HD 217107 b
HD 217107 b is an extrasolar planet approximately 65 light-years away from Earth in the constellation of Pisces (the Fish). The planet was discovered orbiting the star HD 217107 approximately every seven days, classifying the planet as a hot Jupiter. Because of the planet's somewhat eccentric orbit, scientists were able to confirm another planet within the system (HD 217107 c).
Discovery.
As with the majority of extrasolar planet discoveries so far, it was found by detecting small variations in the
Discovery Indication of second planet.
While most planets with orbital periods of less than 10 days have almost circular orbits, HD 217107 b has a somewhat eccentric orbit, and its discoverers hypothesized that this could be due to the gravitational influence of a second planet in the system at a distance of several astronomical units (AU). Confirmation of the existence of a second planet, HD 217107 c, followed in 2005.
See also.
- HD 217107
- HD 217107 c