The asteroid flew closer to Earth than telecommunication satellites, according to officials.
He says NASA asteroid warning system does not always provide early detection.
The asteroid C0PPEV1 since renamed as 2019 United Nations 13 flew 3,852 miles (6,200km) above the Earth, which makes it one of the closest near-misses in recorded history; the asteroid appeared closer to the planet than any known Near-Earth Objects (NEOs) on NASA's radar which is 3,852 miles distance above Earth is even more frightening when considering.
It was spotted flying by the Earth by the Catalina Sky Survey, based in Arizona, and shortly thereafter by New Mexico's Magdalena Ridge Observatory and Arizona's Mt. Lemmon Steward Observatory.
The average distance between Earth and the Moon is about 238,900 miles (384,472km) so this flyby will be less than half that distance, making it a close call but not the closest we've had recently.
The asteroid was first picked up by Tony Dunn and tweeted: "In about 45 minutes from now, newly-discovered asteroid C0PPEV1 will pass only 6200 km above Earth's surface." .
"This is much closer than our geostationary satellites".
The asteroid passed by Earth at a speed of almost 27,000 miles per hour (43,452 kph).
NASA claims the asteroid was likely only between two and seven meters in diameter. Several space experts including Dr Iain McDonald believe that the dreaded events like asteroid hits are not confined to the past, and it will happen in the future too.
They suggest that the asteroid would likely have vaporized due to friction with the air if it entered the atmosphere.
This contrasts to the Chelyabinsk incident in Russian Federation in 2013 when an asteroid struck Russian Federation.
The space rock is roughly the same size as the infamous Chelyabinsk meteor which exploded in the skies above Russian Federation, causing widespread damage to 7,200 buildings and injuring over 1,000 people.