UFO sighted over Southeast Asia in 1963

Summary

A Navy officer observed an object in the sky over Southeast Asia in July 1963. The UFO appeared as a first magnitude star and moved rapidly across the sky for eleven minutes before suddenly disappearing. Orbital calculations matched the path of ECHO I, an American satellite. Although other possibilities were considered, investigators concluded the sighting corresponded to the satellite. The observer's exact location and the precise timing of the sighting aligned with the satellite's orbital predictions, supporting this conclusion.