Simplify the following text for a Grade 8 native English-speaking person.
Original: Mundilfari is about 5.6 kilometres in diameter , and orbits Saturn at an average distance of 18,360 Mm in 928.806 days , at an inclination of 170 Â to the ecliptic ( 150 Â to Saturn 's equator ) , in a retrograde direction and with an eccentricity of 0.198 .
Simplified: Mundilfari is about 5.6 kilometres in diameter , and orbits Saturn at an average distance of 18,360,000 km in 928.806 days , at an inclination of 170 Â to the ecliptic ( 150 Â to Saturn 's equator ) , with an eccentricity of 0.198 .