At the upper end of NASA’s estimate, the asteroid is taller than Cinderella’s Castle in Walt Disney World, Florida.
At the lower end of NASA’s estimate, the asteroid is still formidable and is comparable in width to the length of a cricket pitch.
NASA believes any asteroid bigger than 82ft (25m) across will not disintegrate when flying through the atmosphere.
The asteroid is also flying towards us at speeds of about 9.51km per second or 21,273mph (34,236kmh).
But will the asteroid come flying into our planet tomorrow?