Itokawa asteroid (IMAGE) University of Hawaii at Manoa Caption Itokawa's curious, varied terrain and lack of impact craters indicate it is a rubble pile asteroid. Credit NASA/JPL Usage Restrictions No restrictions. License Public Domain Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.