Project 10073 Record Cards and Related Correspondence — Denver, Colorado, August 1959

This document collection comprises a series of Project 10073 record cards and associated military teletype messages regarding multiple UFO sightings reported in the Denver, Colorado area during August 1959. The reports describe objects observed by both military and civilian witnesses. Common characteristics reported across the sightings include a tear-drop or cylindrical shape, a blue-to-white color, and a high-speed, straight-line trajectory. Witnesses frequently described the objects as having a tail or exhaust and appearing to descend rapidly before disappearing behind hills or clouds. One report specifically notes the object had the appearance of a burning object re-entering the atmosphere. The duration of the sightings varied significantly, ranging from half a second to fifteen seconds. Official military evaluations consistently categorized these events as likely meteor observations. Major Robert J. Friend, acting for the Air Technical Intelligence Center (ATIC), requested that the local headquarters at Lowry Air Force Base initiate formal investigations in accordance with Air Force Regulation 200-2. This included requests for precise elevation and azimuth data and coordination with the University of Denver Observatory to confirm the possibility of meteor activity. Despite the official conclusion of meteor activity, some witnesses, including those with technical backgrounds, expressed firm disagreement with this assessment. The documents reflect the standard military procedure for processing and evaluating aerial phenomena reports during this period, emphasizing the collection of specific physical and observational data to rule out conventional explanations.