As of Friday Sept. 23, 2011, at 10:30a.m. EST, NASA’s Upper Atmosphere Research Satellite, or UARS, is expected to re-enter Earth’s atmosphere late Friday night or early Saturday morning, EST. Tonight the 6 1/2-ton satellite could make its uncontrolled “death plunge” through Earth’s atmosphere, after the end of a productive scientific life.
NASA scientists cannot yet determine exactly where the satellite will land but earlier said it will fall over a region somewhere between the latitudes of northern Canada and southern South America. Today NASA said there is a low probability any debris that survives re-entry will land in the United States, but the possibility cannot be discounted because of this changing rate of descent
It is still too early to predict the time and location of re-entry with any certainty, but predictions will become more refined in the next 12 to 18 hours.