Sponde is about 2 kilometres in diameter , and orbits Jupiter at an average distance of 24,253,000 km in 771.604 days , at an inclination of 154 Â to the ecliptic ( 156 Â to Jupiter 's equator ) , with an eccentricity of 0.443 . Sponde is about 2 kilometres in diameter , and orbits Jupiter at an average distance of 24,253 Mm in 771.604 days , at an inclination of 154 Â to the ecliptic ( 156 Â to Jupiter 's equator ) , in a retrograde direction and with an eccentricity of 0.443 .