LOS ANGELES - The largest asteroid to pass by our planet in 2021 will be at its closest on Sunday, providing astronomers a rare chance to see the giant rock that formed at the dawn of our solar system.According to a statement by NASA, the near-Earth asteroid, called 2001 FO32, will make its closest approach at a distance of about 1.25 million miles — equivalent to 5 1/4 times the distance from Earth of the moon.Discovered in 2001, FO32 will pass by at about 77,000 mph, which is faster than the speed at which most asteroids encounter Earth, NASA said."The reason for the asteroid’s unusually speedy close approach is its highly inclined and elongated (or eccentric) orbit around the Sun, an orbit that is tilted 39 degrees to Earth’s orbital.