A small asteroid, named C0WEPC5, is set to hit Earth's atmosphere over Siberia today.The asteroid, approximately 0.5 to 1.2 meters in size, will enter Earth's atmosphere around 16:14 UTC.The impact is expected to create a fireball but will not cause any damage.This is the 11th time ever and the 4th time this year that astronomers have spotted an asteroid just before it crashed into Earth's atmosphere.