The odds are about 1% that the football field-sized object could hit the Earth, but that makes it the closest call in more than 20 years.
The findings provide the strongest evidence yet that asteroids may have planted the seeds of life on Earth and that these ingredients were mingling with water almost immediately.
Local BBC Radio joins BBC Radio 5 live through the night on a weekend.
NASA is fueling an exciting future for citizen science by funding 25 new projects across diverse fields, from astrophysics to Earth science. These projects empower the public to contribute to ...