Hello, I am playing with the possibility of using the combination of Find_Orb and Guide to visualize the impact ground track of asteroids. I am running 2011 AG5 with pre-October observations when it had a chance of 1/500 to hit the Earth. As expected, I find only a few entries in the 'virtual.txt' file. But only some of them give longitude/latitude on the Earth. So what are the criteria when an orbit ends up in this file? And what are the columns? Some I could figure out but not all. Is this documented somewhere?

Thanks for pointing me to the right place!

Detlef.