Asteroid SF6 is a so-called Near-Earth Object or NEO, meaning its trajectory brings it incredibly close to Earth.
NASA said: “Most asteroids and comets orbit the Sun far from Earth.
“However, some space rocks travel along orbits that are just a little farther away from the Sun than is the Earth.
“In fact, some of these orbital paths actually approach Earth, coming just a little farther or a little closer than the Moons distance.
“It is these objects, especially the larger ones, that we closely observe and track.”
