Patrick, By the way I figured out how to use the data from the Project Pluto and how to plug the into my Starry Night Planetarium software. I found a place under asteroids that allowed input of Orbital Elemental data. So I pick out the elements required and pluged it in. The planetarium software drew an orbit for me and predicted the space junk’s location. Of course with NEO's which are moving fast and may well have their orbits affected minute by minute by the gravity of the Earth, their elements will be changing continuously so will it's orbital elements, leaving me to wonder whether I should rely on SN. And sure enough they did change. You may have seen Bill Gray’s update with new data because he got more information from different stations. I check the Orbital elemental data and they had changed. Not by a lot but maybe enough that you may not have been in the right place if you didn’t catch his latest update. jg