[T. P. Pole]

Assuming its mass is the same as water

Now, now, we all know the density of a comet is the same as a hot fudge sundae.

[6ppc]

Now, now, we all know the density of a comet is the same as a hot fudge sundae.

Hmmm...wonder if it's going to impact on a Tuesdae???

[stormer]

It may very well be. Estimates of comet density average about .6g/cm^3 (of course the data is spotty). I selected the density of water as a standard because of its ease of use and the fact that it is a metric that most people understand. That said, the USDA standard for full fat ice cream is a minimum of 4.5 lbs/gallon. Conversion to the metric system gives a density of approximately 539 grams/liter or .539g/cm^3, slightly under the estimated average comet density. Recalculating the mass of the comet using the density of full fat ice cream, we arrive at 3.5*10^13 metric tons. If the collision takes place, it will still be a significant event.