Unidentified aerial sighting near Salvador

Summary

A pilot reported an unidentified aerial object during a flight near Salvador, Brazil, on September 27, 2008. The object was moving at a speed much greater than the aircraft and was approximately 10,000 feet in altitude. Its trajectory went from west to east, and it did not leave a trail or emit sound. The observer, a pilot with technical knowledge of aviation and meteorology, reported the incident to air traffic control. The object disappeared over the horizon after being sighted.