If everything in the sky is circling above a flat Earth, then how do NEAs pose a danger to a flat Earth? These are asteroids whose orbital path has been observed, tracked and calculated to cross the orbit of Earth. Thus theoretically endangering a collision at some point in the future.
There are scans of the sky being made constantly for these NEAs and the website spaceweather.com contains a list of several together with the time of their closest approach to Earth. Distances quoted in terms of LD or lunar dstance.
The way FE Wiki describes the FET I cannot see how any asteroids could present such a threat to Earth as they would remain forever above the Earth. In fact unless I have overlooked it I cannot find any mention of asteroids in FE Wiki.