Project 10073 Record Card — London, England, 12 December 1952

This document comprises a series of reports and administrative records concerning an unidentified aerial phenomenon observed on December 12, 1952, in London, England. The primary incident involved an observer at the 568th Motor Vehicle Squadron barracks who reported seeing a watermelon-shaped object emitting a white light. The object was described as slow-moving and highly maneuverable, performing a sideways sliding motion before disappearing behind buildings. The sighting lasted approximately three minutes under clear, starry conditions with no wind. The observer noted that there was no audible sound and no visible exhaust or trail. Subsequent investigation by Sergeant Washburn and Major Joseph C. Johnson, Jr. involved interviewing the witnesses and mapping the object's path relative to the barracks. The official military assessment, filed under Project 10073, concluded that there was insufficient information to reach a definitive explanation. While the investigators noted that the description was reminiscent of the landing lights of an incoming aircraft, they emphasized that the lack of data regarding local air traffic and the reliability of the observers precluded a formal identification. The documentation includes a record card, a formal intelligence report, and hand-drawn diagrams illustrating the observer's position and the object's trajectory. The file is marked as having been restricted and subsequently downgraded under DOD Directive 5200.10.