This object 2018LA was a small (2-3 metres in diameter) Apollo near-Earth asteroid. It was discovered 8 hours before impact by
the Mt. Lemmon Observatory of the Catalina Sky Survey.
Although this kind of impact events occur quite frequently,
this case was the third after 2008TC3 and 2014AA which were discovered before impact.
The Impact occurred on 2 June 2018 at 16:54 UTC (18:54 local time), near the border of Botswana and South Africa.