Project 10073 Record — Sighting Report, Denver, Colorado, 24 September 1952

This Air Intelligence Information Report, dated 3 October 1952, details a sighting of unidentified aerial phenomena reported by Technical Sergeant Billy Ross Hughes of the 3415th Aircraft Gunnery Group at Lowry Air Force Base, Colorado. On 24 September 1952, at approximately 2215 ZULU, Sergeant Hughes observed a formation of five or six circular, bright white objects while in the business district of Aurora, Colorado. The objects were described as circling in a trail formation, with the diameter of the circle being five to six times the size of an individual object. The observer noted that the objects exhibited no metallic glint, produced no sound, and left no exhaust trails. The speed of the objects was compared to that of a jet aircraft passing 800 feet overhead. During the five to six-minute observation, two C-47 aircraft passed through the observer's line of sight, but the objects remained distinct. Eventually, one of the objects broke the formation and dove until it disappeared behind a building, after which the remaining objects could not be relocated. Weather conditions at the time were reported as 1/10th cloud coverage at 6,000 feet. The report, prepared by 1st Lieutenant Alfred B. Sisemore, confirms that no photographs or physical evidence were obtained, and no intercept action was taken. The official conclusion recorded in the Project 10073 documentation for this incident is 'UNKNOWN'. The report includes detailed meteorological data, including winds aloft, to assist in the evaluation of the sighting.