Day after XF11 impact

In December 1997 astronomers of the Spacewatch Program forecast  the transit of  asteroid XF11 at a distance of only 48,000 km from the Earth and they even supposed a collision with the planet. It would have been a terrible event involving the release of millions megatons, equal to the  explosion of a nuclear bomb of 10,000 million tons of trinitrotoluene (Hiroshima bomb: 12,500 tons).

…to be continued…

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