"The average velocity of the earth in orbit is 18.5 miles per second.
If the miss is 26500 miles then we miss by about 24 minutes."
But this is a leap year, and 2000 wasn't. Oh crap, redo the calculations!!
2000 WAS a leap year! 1700, 1800, and 1900 were not!!
Good Lord, the calculations are all wrong!
We're screwed.