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By TechThop Team
Posted on: 30 Jul, 2022
This weekend, an asteroid the size of the Chrysler Building will safely fly past Earth. Space rock 2013 CU83 is predicted to make a close approach to our planet. According to NASA's Center for Near Earth Studies database, the asteroid will pass within 4.3 million miles of Earth at 11:37 p.m. Central Time, or 7:37 p.m. ET.
To put this close approach into perspective, 4.3 million miles is approximately 18 times the distance between Earth and the moon. On the scale of our solar system, this may seem like a large distance, but astronomers consider it a close approach. However, 2013 CU83 will not collide with our planet this time due to its well-known trajectory.
The size of these space rocks varies dramatically. Asteroid Vesta is the largest known asteroid, measuring around 329 miles across. The majority of asteroids, however, measure less than 33 feet in diameter.
NASA has identified more than 1.1 million asteroids to date, most of which are found in the main asteroid belt between Mars and Jupiter.
During its close approach to Earth, 2013 CU83 will be traveling at 13,100 mph, which is more than six times faster than a rifle bullet, and seventeen times faster than sound.
Based on its observed magnitude in the sky, the asteroid measures anywhere between 459 and 1,050 feet across. In the upper range of this size range, the 2013 CU83 would be roughly as tall as the Chrysler Building in New York City.
It can be challenging for astronomers to estimate the size of asteroids, thus the CNEOS provides a range of sizes.
'Measuring the size of distant objects in space is difficult,' Greg Brown, an astronomer at Royal Observatory Greenwich, explained to Newsweek in May. 'Because they often appear as dots in telescopes, it's hard to tell how big they are based on how bright they appear.'
According to him, the larger it is, the more light it will reflect, making it appear brighter. 'However, this requires an assumption of how reflective the material is, which can vary greatly. Add to that several other complications, and the actual size of an object can differ significantly.'
Scientists have discovered more than 29,000 near-Earth objects, or NEOs, to date, most of which are asteroids. Any astronomical body passing within around 30 million miles of the planet is considered an asteroid.
source: newsweek
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