👉 An athetoid, also known as an atomoid, is a type of asteroid that is believed to have originated from the collision between two bodies in the solar system. These asteroids are typically small and rocky, with diameters ranging from about 10 to 20 kilometers. They were first detected by astronomer William Herschel in 1846. Atheoids are thought to be remnants of a larger celestial body that was destroyed or collided with another asteroid. It