Simplify the following text for a Grade 12 native English-speaking person.
Original: A second , smaller ( estimated diameter of 6 km ) satellite that orbits closer to Eugenia than Petit-Prince has since been discovered and provisionally named S\/2004 ( 45 ) 1 .
Simplified: A second , smaller ( estimated diameter of 6 km ) moon that orbits closer to Eugenia than Petit-Prince has since been found and provisionally named S\/2004 ( 45 ) 1 .