Arche is about 3 kilometres in diameter , and orbits Jupiter at an average distance of 23,717,000 km in 746.185 days , at an inclination of 165 Â to the ecliptic ( 162 Â to Jupiter 's equator ) , with an eccentricity of 0.149 . Arche is about 3 kilometres in diameter , and orbits Jupiter at an average distance of 23,717 Mm in 746.185 days , at an inclination of 165 Â to the ecliptic ( 162 Â to Jupiter 's equator ) , in a retrograde direction and with an eccentricity of 0.149 .