This is what astronomers are predicting.
Last time it visited, in 2012, it was twice as far away as it is now. This time it should be 27,300 miles away, but that is only 5,000 further out than some of our satellites. If it carries on like this then in 2022 it could....
It is the size of a house (15 x 32 m) and speeding towards faster than Usain Bolt.