Astrophysics of Andalusia’s Pablo Santos-Sanz said: “Although this approach shall not be so favourable [as in 2015], we will be able to obtain new data which could help improve our knowledge of this mass and other similar masses that come close to our planet.”
The dark rock only reflects 5 or 6 per cent of the sunlight that hits its surface but spans a massive 625 to 700 metres across.
Its size means that if it were to strike the planet there may be some devastating effects.
Mr Santos-Sanz said: “It is currently 3.7 astronomical units away from Earth; that is, 3.7 times the average distance from the Earth to the sun.
“It has a magnitude of 26.5, which means it is only visible from Earth using very large telescopes or space telescopes."
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