Summary 2014 AA was the second object to be detected before impacting the Earth. The meteoroid was discovered on 1 January 2014 by the Mount Lemmon Survey and impacted the atmosphere over the...

Summary 2008 TC3 was the first object detected in space prior to impacting the Earth. Discovery occurred at 06:39 UTC on 7 October 2008 by the Catalina Sky Survey and the meteoroid entered the...

The Planetary Defence community has detected the fifth asteroid impactor