[Looking for Diogenes]

...smash into the oceans at 45,0000 miles per hour.
Now I'm a little dubious of their calculations. An extra zero here and a zero there could throw off their predictive model by a considerable degree.

Why are you dubious?

A quick check on the interent brings up a site which declares that:

There are many different speeds of asteroids. The average speed of an asteroid is 25km/second.

25km/second equals 56,000 mph, or nearly the same speed as they used for the model.

[Rudder]

45,0000 does not come close to 56,000. Please read their numbers again.