Simplify the following text for a Grade 10 native English-speaking person.
Original: S\/2000 J 11 is about 4 kilometres in diameter , is calculated to have gravity 200 times that of Earth , and orbits Jupiter at an average distance of 12,555,000 km in 287 days , at an inclination of 28 Â ( to Jupiter 's equator ) , and with an eccentricity of 0.248 .
Simplified: S\/2000 J 11 is about 4 kilometres in diameter , and orbits Jupiter at an average distance of 12.555 Gm ( million km ) in 287 days , at an inclination of 28 Â ( to Jupiter 's equator ) , and with an eccentricity of 0.248 .