Project 10073 Record Card and Air Intelligence Information Report - Monterey Peninsula, California, 1 September 1959

On September 1, 1959, at approximately 2015 PDT, Major John W. Sherwood, Jr. and 1st Lt. Roy C. Gill were flying a T-33 aircraft (tail number 53-4973) over the Monterey Peninsula, California, at an altitude of 30,000 feet. During a routine scan, they observed a bright white light to the east, which they initially mistook for a star or another aircraft. As the object approached, it became clear that it was moving at a high rate of speed. The pilots turned their aircraft to maintain surveillance. As the object passed to the south of their position, they estimated its altitude to be between 40,000 and 50,000 feet. Major Sherwood reported seeing very faint, bluish-green squares trailing the white light, though Lt. Gill, who was piloting the aircraft, did not observe them. The object continued on a level east-to-west course, moving out over the Pacific Ocean. Once over the water, the light extinguished for approximately 10 seconds, reappeared for a few seconds, and then vanished permanently. The pilots estimated the total duration of the sighting to be between three and five minutes. They noted that the object's speed was significantly higher than their own, which was approximately 340 knots, making any attempt to intercept it futile. No radar contact was made, and there were no reports of electromagnetic interference with their aircraft's systems. The incident was formally reported through military channels, including the 28th Air Division and the Air Technical Intelligence Center (ATIC). The official conclusion reached by the investigators was that the object was likely a high-performance aircraft, and the trailing bluish-green squares were attributed to the operation of an afterburner. The documentation includes the original record card, the formal intelligence report, and subsequent administrative correspondence regarding the investigation.