This site provides information related to the recently discovered asteroid 1997XF11 and how close it will come to Earth in 30 years. The Harvard-Smithsonian Center for Astrophysics provides a hyperlinked press release about 1997XF11, discovered by Professor James Scotti of the University of Arizona. The first estimates were as close as 30,000 miles. Scientists at the National Aeronautics and Space Administration's Jet Propulsion Laboratory disputed this estimate and came up with one of their own: 600,000 miles. The JPL news release is a terse announcement of findings by Dr. Donald K. Yeomans and Dr. Paul W. Chodas.