Astronomers say that the observation of an asteroid the size of a pickup truck just a few days before it passed Earth, Thursday, although it did not pose any threat to humans, highlights a lack of predictability of what might cause actual damage.
For years, the US Aeronautics and Space Administration (NASA) has given priority to detecting asteroids that are much larger and more threatening to the existence of humanity than the small space rock “BU 2023”, which moved 2,200 miles from the Earth’s surface, a distance closer than some satellites.
And even if it went towards Earth, the atmosphere would crush it, and only small fragments would reach the land.
But “BU 2023” is the smallest of a group of asteroids with a diameter of between five and 50 meters, which also includes large sizes equivalent to an Olympic swimming pool.
It is difficult to detect objects of this size before they are much closer to Earth, which complicates any efforts to prepare for what might affect a populated area.
NASA says that the probability that a space rock, called a meteorite, will collide with the Earth when it enters the atmosphere, its size in this range is relatively low, and this varies according to the size of the asteroid, as it is estimated that the probability of targeting a rock with a diameter of five meters is once a year, and a rock with a diameter of 50 meters is Once every thousand years.
But with the current capabilities, astronomers cannot know when such rocks are heading towards Earth until days before.
“We don’t know where most of the asteroids that might cause local and regional devastation are,” said planetary scientist at Johns Hopkins Applied Physics Laboratory, Terek Daly.
NASA’s Jet Propulsion Laboratory says that the nearly 20-meter-diameter meteorite that exploded in 2013 over Chelyabinsk, Russia, is something that happens once every 100 years.
The fall of the meteorite caused a shock wave that shattered tens of thousands of windows, and caused damage amounting to $33 million, and no one saw it before it entered the Earth’s atmosphere.
