Scientists continue to monitor asteroid Bennu, one of the most closely watched near-Earth objects, because of its small but measurable chance of colliding with Earth in the distant future.
Although the possibility of an impact is considered very low, researchers estimate that if Bennu were to strike Earth, it could release energy comparable to about 22 atomic bombs, causing severe local destruction depending on the impact location. Bennu is a carbon-rich asteroid measuring roughly 500 metres (1,640 feet) in diameter.
It has been extensively studied by NASA through the OSIRIS-REx mission, which successfully collected samples from its surface and returned them to Earth for analysis. Scientists say Bennu poses no immediate threat, but its orbit is continuously monitored to refine future predictions.
Current estimates indicate that any potential impact, if it were to occur, would not happen for well over a century. One of the world’s best-preserved examples of an asteroid impact is Meteor Crater, also known as Barringer Crater, near Flagstaff, Arizona, in the United States.
The crater spans about 1.2 kilometres (3,900 feet) in diameter and reaches a depth of approximately 170 metres (560 feet), providing researchers with valuable insight into the effects of cosmic impacts. Experts stress that while Bennu remains under close observation, there is no cause for public alarm.
Ongoing monitoring and advances in planetary defence are helping scientists better understand and prepare for any potential future asteroid threats.
