Facebook post by University of Helsinki

30 June is the global Asteroid Day, held on the anniversary of the most harmful known asteroid-related event on Earth in recent history. Fit for the occasion, researchers have just managed to calculate perfectly where the fragments of a meteorite that hit Russia last week landed. The calculations were based on video records of the fireball on the Russian sky. Asteroid Day at Helsinki Observatory https://museot.fi/nayttelykalenteri/index.php?nayttely_id=18732
Researchers made a 'perfect calculation' of the trajectory of meteorite fragments helsinki.fi

While the likelihood of a globally threatening event is low, the mathematical expectation is realistic due to the catastrophic consequences caused to the entire ecosphere.