[no-to-illegals]

yep. Constructing the path to be taken, by a comet, is nearly a shot in the dark. Comets appear from nowhere, and the calculations are normally thirty percent to forty percent correct on the path. Whoever said our planet (Earth) sits in the middle of a shooting gallery knew exactly what was true.

[mylife]

Lots of exposure to error at astronomical distances.

[Strategerist]

Constructing the path to be taken, by a comet, is nearly a shot in the dark. Comets appear from nowhere, and the calculations are normally thirty percent to forty percent correct on the path

Sorry, this is completely wrong.

the orbit has already been calculated with quite high precision in just a few days.

The uncertainty lies with how bright it gets - THAT is a shot in the dark. Or whether the comet breaks up as it approaches the sun.