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 22,740 Mm in 700.538 days , at an inclination of 149 Â to the ecliptic ( 149 Â to Jupiter 's equator ) , in a retrograde direction and with an eccentricity of 0.3931 .
Simplified: is about 2 kilometres in diameter , and orbits Jupiter at an average distance of 22,740,000 km in 700.538 days , at an inclination of 149 Â to the ecliptic ( 149 Â to Jupiter 's equator ) , with an eccentricity of 0.3931 .