The object called 2020 CD3 and measuring just a few metres in diameter, entered Earth's orbit about three years ago. The ‘mini-moon’ circles the Earth every 47 days but is slipping from Earth’s gravitational pull and in few months will leave us.
The technology can aid emergency services fighting forest fires when normal satellite images are obscured by smoke.
At the end of July a massive asteroid dubbed ‘City Killer’ hurtled past earth. If it had hit Warsaw, the whole of central Poland would have been threatened with a crater several kilometres wide and 400 metres deep, says planetary geologist Dr Anna Łosiak.
Named by the Polish astronomers who found them, the planets could be just two of millions floating through the galaxy. So far, though, scientists have only managed to locate a dozen or so rogues, which is why adding these two to the bunch is deemed important.