is about 2 kilometres in diameter , and orbits Jupiter at an average distance of 19,813,000 km in 569.728 days , at an inclination of 147 Â to the ecliptic ( 149 Â to Jupiter 's equator ) , with an eccentricity of 0.1570 . is about 2 kilometres in diameter , and orbits Jupiter at an average distance of 19,813 Mm in 569.728 days , at an inclination of 147 Â to the ecliptic ( 149 Â to Jupiter 's equator ) , in a retrograde direction and with an eccentricity of 0.1570 .