FACTFILE

Oumuamua is 1,312 ft long travelling at 59,030mph.

It is the first rock to travel from another star system to our solar system. It may have been racing through the Milky Way for hundreds of millions of years.

High in metal content, but lacking significant amount of water or ice.

It spins round every 7.3 hours on its axis.

It will leave our solar system in 2019, bound for the Pegasus constellation.