Project 10073 Record Card — Denver, Colorado, 29 June 1960

On June 29, 1960, at 0901Z, a college student at Denver University in Denver, Colorado, observed a group of seven small, bluish, circular objects. The witness reported that the objects traveled in a straight line from the northwest to the southeast for approximately ten seconds before disappearing over the horizon without changing their relative positions. A teletype report further detailed that the objects were approximately one-eighth the diameter of the full moon, with one disk appearing nearly the size of the full moon. The witness also noted a large, single, faint ghost image that appeared to rotate. The sighting occurred on a clear night. Military authorities investigated the incident under Project 10073. The official conclusion reached by the Air Technical Intelligence Center (ATIC) was that the event was a probable meteor shower. The report suggests that a bolide, which may have exploded early in its flight, created the visual appearance of multiple objects moving in formation. An officer in the clearance and dispatch section noted the presence of a temperature inversion between the surface and 3,000 feet, which may have contributed to the visual conditions. No radar contact was reported, and no physical evidence was recovered.