An impacting object hit the asteroid Vesta making a 10 mile diameter crater and in the process blasted loose fragments which have been orbiting the Sun for 22 million years or so. In June of 2018 my Catalina Sky Survey teammate Richard Kowalski discovered one of them streaking towards Earth with our 60 inch telescope on Mt. Lemmon , AZ. This small space rock crashed into Earth raining fragments upon the Central Kalahari Game Reserve in Botswana.