Asteroid Heading Towards Earth 2024 Date. 29, 2028, though this year’s approach is the closest it’s. A small asteroid on a collision course with earth today burned up harmlessly in earth's.
The object with the highest probability of colliding with earth was the 1,100 feet (340 m) wide asteroid 99942 apophis, which was predicted to get dangerously close. Imagine if scientists discovered a giant asteroid with a 72% chance of hitting the earth in about 14 years — a space rock so big that it could not only take out a city.