'Mini-moon' may have been orbiting Earth for the last three years

Earth may have had a 'mini-moon' for three years that has only just been discovered, according to astronomers who spotted the object orbiting the planet, Euronews reports.

The object, which is thought to be around the size of a car, was observed on February 15, and is likely to be an asteroid captured by Earth's gravity.

The satellite, which is between 1.90 and 3.50 metres in size, was observed by Kacper Wierzchos and Teddy Pruyne of the Catalina Sky Survey project, which is funded by Nasa.