Even though this is off topic I think it's better to discuss these so people who may not be sure can have some ideas of what to look for, and why or why not they should click a possible hit.icebike wrote: I would have studied 16490 to death, and then I would have clicked no track.
ALL of the lower corner comes into focus at the same time as the particle. Its a slanted surface, and the lower right corner is the farthest down hill.
In my opinion, 16490 is clearly something that should be clicked on. The knife shaped "peninsula" (points west-south-west) it appears directly under is almost perfectly in focus on the top frame (it appears that the movie starts a little below that surface). It is only the furthest bit of the south-east corner - beyond the suspected object - that is out of focus. As you scan down, the edge line of the peninsula starts thin and defined, then widens and blurs out (drops out of focus), while at the same time the spot comes into focus. If that peninsula were below the focus range of the movie, it would become sharper, not blur out. A perfect candidate in my opinion.
This is my thought process as to why I would have clicked on the suspected track. And yes, I know I'm not looking at a map.. I use cardinal directions just for ease, with north being straight up.
Matt