HD 10180 c [SEP] constellation
HD 10180 c
HD 10180 c is an extrasolar planet approximately 130 light-years away in the constellation Hydrus. With a minimum mass comparable to that of Neptune, it is of the class of planets known as Hot Neptunes. Dynamical simulations suggest that if the mass gradient was any more than a factor of two, the system would not be stable.
While planet c does not exist in any mean motion resonances, both planets with adjacent orbits (b and d) share near resonances with c.
Upsilon Andromedae e
Upsilon Andromedae e is the outermost extrasolar planet orbiting the star Upsilon Andromedae A in the constellation of Andromeda. This planet is one of the most Jupiter-like exoplanets found in terms of mass and semi-major axis.
Discovery.
This planet was discovered on November 22, 2010, but the discovery paper was not released until December 2. It was the fourth time in 2010 that a fourth planet has been discovered in a planetary system, the others being Gliese 876 e, HD 10180 e