Asteroid 2024 Cr940. This is slightly more than two and a half times the distance. It was discovered only 13 days.
— the radar targeted the larger asteroid, 2011 ul21, for nine days and the somewhat smaller asteroid, 2024 mk, for three days. — nasa has alerted the scientific community about asteroid 2024 on, measuring 720 feet in diameter, which is set to approach earth on september 15, 2024.