The rock entered Earth's atmosphere at a speed of approximately 38,000 miles per hour.
An employee of the Office of planetary defense, NASA Lindley Johnson said that it was a much smaller space object that they need to detect and prevent.
Paul Chodas, manager of the Center for Near-Earth Object Studies at NASA's Jet Propulsion Laboratory, said it's only the second time the re-entry location was predicted well in advance. There was instant chaos amongst the people as it indicated a big disaster if the asteroid had hit the surface of the earth. The video was captured at a farm just across the border in South Africa. The asteroid 2018 LA completely burned in the sky before reaching the ground.
The astroboffins only managed to get a couple of readings on the asteroid's trajectory, and thought it would strike somewhere in southern Africa, the Indian Ocean, or possibly New Guinea. About eight hours after these images were taken, the asteroid entered Earth's atmosphere (about 12:44 p.m. EDT, 6:44 p.m. local Botswana time), and disintegrated in the upper atmosphere near Botswana, Africa. However, the CAS clarified that the larger asteroids reflect more sunlight, so usually the medium and large ones can be detected earlier.
While this isn't the first time a small asteroid has been spotted just before it hit Earth, it certainly isn't that common.
The first in 2008 was detected 19 hours ahead of impact, and the second was detected a few hours ahead in 2014. Researchers can upload data about their observations in the scientific centre of Cambridge, where scientists calculate the trajectory of the object, and, if anything, will send the information to NASA.
One such larger object was the asteroid that went completely undetected until it collided with the atmosphere over Russian Federation in 2013, creating a shock wave that blew out thousands of windows in the town of Chelyabinsk ans caused a number of injuries. The second predicted impact event was for asteroid 2014 AA, which was discovered only a few hours before impact on January 1, 2014, in the Atlantic Ocean, leaving too little time for follow-up observations.