Rubble pile asteroids are a type of small solar system bodies that are composed of loosely bound rock and debris. They are believed to have formed from the collision and breakup of larger asteroids, resulting in a jumbled, rubble-like structure held together by gravity. Rubble pile asteroids are common in the asteroid belt between Mars and Jupiter, as well as among Near-Earth asteroids. Studying these objects can provide insights into the formation and evolution of asteroids, as well as potentially hazardous impacts on Earth.