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US space agency NASA has another asteroid sighting as they spot one particular rock moving Earthbound. How big is it, and will it strike?
NASA has spotted one asteroid moving towards the direction of the Earth at a close approach trajectory. Formally named 2020 DZ3, the asteroid is predicted to approach on Monday, March 2nd. The agency has classified DZ3 as an Apollo-type Near-Earth Object or NEO, meaning it is an asteroid that orbits the Sun that sometimes crosses orbits with the Earth. DZ3 measures between 68.9 feet to 154 feet in diameter, making it a relatively small rock that is similar in size to the meteor that struck the city of Chelyabinsk in Russia back in 2013.
Although DZ3 is fairly small, it can still cause a lot of damage if it ever makes it through the atmosphere and impacts land. Much smaller asteroids, on the other hand, will more than likely burn up and explode when it reaches the atmosphere because it is the first time the rock has met some resistance. Despite small meteors burning upon the atmosphere, the fragments coming from the space rock can still affect the Earth below.
Fortunately, the chances for an asteroid collision remain to be very slim as DZ3 will only pass by Earth without striking. The asteroid will get as close to the planet by 0.00765 astronomical units. This is equivalent to 1.14 million kilometers, making it extremely far away by human standards, but close enough to be detected.
As of now, there are a total of 22,000 near-earth objects floating about in space. However, an expert has warned that the Chelyabinsk incident may happen again as there are asteroids that can slip past without being noticed. German Aerospace scientist Alan Harris believed that while the majority of these Near-Earth Objects, around 90 to 95 percent of small to medium-sized asteroids, have already been spotted and accounted for, but asteroids similar in size to the Chelyabinsk meteor, may not be detected if it ever strikes the planet, effectively taking everyone by surprise no matter how prepared the relevant agencies and authorities may be.
Harris added that the existing technology could not detect these kinds of rogue asteroids. “I’d say up to 50 meters or so these days, can slip through defenses and hit the Earth without any warning at all, as Chelyabinsk did.”
