Astronomers have been shocked in recent days when an asteroid, which some call the "urban killer", passed within 45,000 miles of Earth last week – spitting astronomically.
Terrestrial observers tracked several celestial objects that were cut close to Earth's orbit at the same time, but the space debris hook, estimated to be between 57 and 130 meters wide (187-426 feet), was discovered only hours before to cross Earth on Thursday.
Speaking to the Washington Post, Alan Duffy of the Royal Institution of Australia said he was "stunned" and that the sudden appearance of the object, called Asteroid 2019 OK, "was a real shock." He went "awkwardly close," he said. .
As it passed the Earth, the space rock was traveling at 54,000 miles per hour.
This is a video from the upcoming 2019 OK Asteroid meeting that we tweeted all day with Earth: https: // t .co / bjT7uhQJuO pic.twitter.com/3e4UyPcdPl
– ASAS- 1965 SN (@SuperASASSN) July 25, 2019
Astronomer Michael Brown told the American Newspaper that the asteroid had come "Out of nowhere" and that it "came out on us pretty quickly."
"People are only aware of what has happened since it has already passed us," he said. "It shook my morning complacency. It is probably the largest asteroid that has been going so close to Earth for many years. "
According to Duffy, if he had hit," he would have disappeared like a very large nuclear weapon. "
According to the MIT Technology Review," the relatively small size, unusual orbit, and fast asteroid speeds all spoke of difficult sighting. "A space infrared telescope designed specifically for the purpose of detecting asteroids would be better for early detection, according to NASA. So the agency plans to release a near-Earth object camera in 2021. "
An asteroid smaller than 2019. OK wounded hundreds and damaged the synagogue when it struck Siberia in 2013. At that time, in a statement from the Russian Academy science says the meteor above the Chelyabinsk region entered the Earth's atmosphere at a speed of at least 54,000 kph (33,000 mph) and destroyed about 30-50 kilometers above the ground.
People may be most familiar with the concept of asteroid beats from films like Armageddon in 1998 and Deep Impact. While film characters have stopped killing asteroids using nuclear weapons and other tactics, those working on the subject in real life take slightly different action in places like NASA. 
According to the US Space Agency's website , "If an approaching asteroid is detected early enough, it might be possible to divert its path using the gravity of a spacecraft. Instead of sending a percussion device to invade an approaching object, a gravitational tractor device will fly along the asteroid for a long period of years (years to decades) and slowly pull it out of the way on Earth. “