Simplify the following text for a Grade 10 native English-speaking person.
Original: is about 2 kilometres in diameter , and orbits Jupiter at an average distance of 22,731 Mm in 700.129 days , at an inclination of 164 Â to the ecliptic ( 166 Â to Jupiter 's equator ) , in a retrograde direction and with an eccentricity of 0.3438 .
Simplified: is about 2 kilometres in diameter , and orbits Jupiter at an average distance of 22,731,000 km in 700.129 days , at an inclination of 164 Â to the ecliptic ( 166 Â to Jupiter 's equator ) , with an eccentricity of 0.3438 .