Simplify the following text for a Grade 9 native English-speaking person.
Original: Simon F. Green and John K. Davies discovered it in images from October 11 , 1983 while searching Infrared Astronomical Satellite ( IRAS ) data for moving objects .
Simplified: Simon F. Green and John K. Davies , while searching Infrared Astronomical Satellite ( IRAS ) data for moving objects , found 3200 Phaethon ( 1983 TB ) in pictures from October 11 , 1983 .