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🇺🇸 USAF — Project Blue Book

UFO sighted in the Pacific identified as ECHO I

UFO sighted in the Pacific identified as ECHO I
United States6 pages
PDF · official source

Summary

An observer in the Pacific reported a bright object the size of a first magnitude star on July 16, 1963. The object initially moved westward and then southeast, remaining at about 45 degrees elevation for 8 minutes before disappearing. The exact location of the sighting was 35.38N 176.23W. Satellite data matched the orbit of the ECHO I satellite, leading to the conclusion that the observed object was indeed this satellite. The evaluation confirmed it was not a balloon, an aircraft, or an astronomical phenomenon, but the ECHO I satellite in its orbital path.

The information was shared with multiple military and intelligence agencies, including the CIA, NSA, and DIA. Although initially considered to be of unknown nature, orbital calculations confirmed that the ECHO I satellite was precisely at the position of the observed object. This case is a classic example of how UFO sightings can be explained by known space objects, especially during the Cold War era, when satellite presence was common but not always well known to the public.