Hey scientist is tracking an object orbiting the sun that is found between mars and jupiter. an article classify the object as an asteroid it must be at least how many kilometers

An asteroid can be anywhere from about 10 meters in diameter up to about the largest detected of 975km in diameter so there is a large range in sizes. If the small ones hit the earth the damage would be minimal but if one of the larger ones hit it it could cause considerable damage. Most asteroids orbit the sun between Mars and Jupiters but at times they can come close to the earth,

Asmall closed hole formed in an outwash plain or moraine. forms when a  glacier retreats then remains stationary.