HD 205739 B

HD 205739 b is an extrasolar planet located approximately 295 light-years away in the constellation of Piscis Austrinus, orbiting the star HD 205739. This planet has a minimum mass 37% more than Jupiter and orbits 90% of the distance between the Earth and the Sun. The planet has a very elliptical orbit, which has led its discoverers to postulate that the planet's surface temperature varies by about 100 K along the entire orbit. This planet was reported on September 5, 2008 after its discovery at Las Campanas Observatory, where the planet was observed for years by the N2K Consortium while using the Magellan Telescopes. Follow-up observations collected the radial velocity measurements necessary to confirm the candidate as a planet.