Later orbital calculations gave NASA a good idea of the trajectory and size of the asteroid.
JPL estimates that measure of CM4 ranges from 223 feet to 492 feet (68 meters to 150 meters).
Compared to the London Double-Decker bus, the asteroid can be up to 18 times longer.
Even at the lower end of the scale, the Colossal asteroid is still about 30 times longer than the Queen Size Bed and about 17 times the Volkswagen Beetle car.
With these awesome dimensions in mind, the good news is that NASA does not expect that CM4 will crash on Earth at any time soon.
At its closest, the asteroid will miss Earth more than 3.2 million miles (5.2 kilometers).
But the asteroid is a prime example of a so-called "near-meaning object" (NEO), which warrants interest from NASA and fellow space agencies.
NASA explains: "As soon as one is discovered near Earth, scientists around the world begin to look at its orbital path.
"Comments are required for several days before reliable and accurate information is developed in its class.
"In the event that we observe a near-earth object, whose future speed shows it as a danger, understanding the shape, size structure and structure of objects will help in finding the best way to avoid the effect. "
On Monday, the asteroid CM4 will come to Earth from a distance of 0.03534 astronomical units (AU).
A single astronomical unit is approximately 93 million miles (149.6 million km), which is the distance from the sun to the Earth.
The asteroid CM4 will significantly reduce it to 3.28 million miles (5.28 million km).
This is equal to the asteroid flying about 13.75 times far from the Moon.
And when it shoots the past of our home world, then the asteroid will reach the break speed of 27,022mph or 12.08 km/second.
After that, NASA's JPL said that the asteroid will pay another trip in the morning of 30 June
NASA Asteroid Tracker: A 450ft Asteroid is Barreling for APPROACH Monday Reviewed by Know It All on March 09, 2019 Rating: