is about 2 kilometres in diameter , and orbits Jupiter at an average distance of 19,622,000 km in 561.518 days , at an inclination of 146 Â to the ecliptic ( 146 Â to Jupiter 's equator ) , with an eccentricity of 0.2507 . is about 2 kilometres in diameter , and orbits Jupiter at an average distance of 19,622 Mm in 561.518 days , at an inclination of 146 Â to the ecliptic ( 146 Â to Jupiter 's equator ) , in a retrograde direction and with an eccentricity of 0.2507 .