The main objective of this work is the study of the 2003 QO104 whose diameter ranges from 2.5 to 4 kilometers. This massive asteroid is about 1/3rd the size of the K-T impactor that probably wiped out the dinosaurs 65 million years ago. It was discovered on August 31st 2003 by the NEAT-Haleakala-AMOS system and turns around the Sun in 1139.73 days.