An asteroid bigger than the size of a Boeing 747 airliner is moving towards Earth at a speed of 6.68 kilometre per second. The space rock, called Asteroid 2020 RK2, is on a trajectory to cross Earth's orbit on Wednesday (October 7) at around 10:42 pm.
Nasa has said that the asteroid will zoom past at a distance of 38,30,238 km away from Earth's surface so the chances of the asteroid causing any damage are extremely unlikely.
Despite the asteroid coming close to the Earth's orbit, astronomers are not likely to be able to see it from Earth.
Nasa says the asteroid is "bigger than Boeing 747 jet". That is the asteroid could be wider than the wingspan of a Boeing 747, which is 68.5 m.
Asteroid 2020 RK2 is estimated to be anywhere between 36m and 81m (118.11 to 265 feet wide) in diameter.
Nasa has said that after the asteroid zooms past the Earth's orbit on Wednesday, it is not likely to visit us again until August 2027.
Last month, a school bus-size asteroid briefly visited the Earth's orbit, zooming past at a distance of about 22,000 kilometers.
Scientists estimated that Asteroid 2020 SW was roughly 15 to 30 feet wide. Although it was not on an impact trajectory with Earth, if it were, the space rock would almost certainly break up high in the atmosphere, becoming a bright meteor known as a fireball.