Officials at Vandenberg Air Force Base in California determined the location to be in a remote area in the Southern Hemisphere of the Pacific Ocean, far from any major land mass.
Officials say the satellite entered the atmosphere at 9:01 p.m. on Sept. 23, landing 14.1 degrees south latitude and 189.8 degrees east longitude.
NASA says UARS broke into pieces upon re-entry, and most were burned up in the atmosphere. There say 26 pieces totaling 1,200 pounds could have survived and reached the Earth's surface.
NASA is not aware of any possible debris sightings from this geographic area.
UARS was launched Sept. 12, 1991 aboard the shuttle Discovery and ceased its scientific life in 2005.