21:2321:23, 9 June 2013diffhist−1
Chicxulub impactor
According to one of the provided references (Plotner, Universe Today, 2011) the diameter is of 150 km (93 miles). And according to this: http://impact.ese.ic.ac.uk/ImpactEffects/Chicxulub.html the diameter of the final crater is 154 km (95 miles).