Euporie is about 2 kilometres in diameter , and orbits Jupiter at an average distance of 19,088,000 km in 538.780 days , at an inclination of 145 Â to the ecliptic ( 145 Â to Jupiter 's equator ) , with an eccentricity of 0.0960 . Euporie is about 2 kilometres in diameter , and orbits Jupiter at an average distance of 19,088 Mm in 538.780 days , at an inclination of 145 Â to the ecliptic ( 145 Â to Jupiter 's equator ) , in a retrograde direction and with an eccentricity of 0.0960 .