This asteroid actually crashed against Earth and changed space science forever

tech.hindustantimes.com:

Asteroids often make close approaches to Earth, and they mostly do so without causing any harm. However, there is no guarantee that an asteroid will not hit Earth in the future. If history has taught us anything, nothing in life is certain. That turned out to be true, especially for people of Russia as an asteroid strike on Earth was reported in the city of Chelyabinsk on February 15, 2013. It recorded a 59-foot asteroid exploding over the city which left nearly 8000 buildings damaged and over 1000 people injured.

However, this wasn't the only asteroid strike in history, which had a devastating effect on Earth. Another asteroid event in recent recorded history happened in 1908, when a 196 feet wide asteroid exploded near the Podkamennaya Tunguska River in Eastern Siberia, Russia. Known as the Tunguska event, it had flattened 2150 square kilometers (about half the area of Rhode Island) of forests. Horrifically, it had killed as many as 80 million trees.

So, when the asteroid over the city of Chelyabinsk exploded, it caused the space rock to break down into small rocks which rained on the city. Glass shards from broken windows caused by the shock wave injured people and others reported eye damage. The Chelyabinsk event not only caused millions in damage, but it was a wake-up call too.

The event changed everything. It became a pivotal moment for humans to recognize the terrifying threat that floated above them. It showed the need for better study and tracking of asteroids and other celestial objects and led to the formation of various organizations which monitor Near-Earth Objects (NEOs) for potential impact.

NASA's Center for Near-Earth Object Studies was set up which computes high-precision orbit paths for NEOs from positions