Upsilon Andromedae E - Characteristics

Characteristics

Upsilon Andromedae e is a so-called “Jupiter-twin” because it has a mass slightly greater than Jupiter's and orbits at a similar distance as Jupiter from the Sun, at precisely 5.2456 AU compared to 5.2043 AU for Jupiter. Although only the minimum mass is determined since inclination is not yet known, its true mass might be much greater. It takes over a decade to orbit the star. At an eccentricity of 0.00536, the planet's orbit is more circular than that of any of the planets in our solar system.