But difference in trajectories that Wordwind was interested in seems to be quite small. ~ wwh

Maybeso Bill, but I saw a website (NASA maybe) where the visual simulation of the (then) upcoming leonids showed them streaking in different directions from a central, but large sector of the sky. To me the relative motions, as you have outlined, would all come into play, but the size of the shotgun scatter pattern of these cometal pieces of rocks as they follow the path of their orbit would be the determining factor inasmuch as what direction their fall would take relative to an observer on earth. That is, if the scatter pattern was larger than the diameter of earth the fact that the individual positional extremes would still be directed towards the single atom at the center of the earth (Hi Hogwash) and that would insure that they would be viewed as streaking in different directions by an observer at any point on earth.

Well. It could not be otherwise and still be within our current understanding of what is.