Project 10073 Record Card — Seattle, Washington, 2 October 1959

This document details a UFO sighting report from October 2, 1959, in Seattle, Washington, involving personnel from Battery D, 2nd M.B., 43 Artillery. The incident, which lasted approximately three hours, involved five objects tracked on radar and observed visually. Witnesses described the objects as round, roughly the size of a quarter, and exhibiting white and blue flickering lights. The objects reportedly appeared in pairs and displayed erratic flight patterns. Radar contact was described as a weak blip, and visual contact was eventually disrupted by fog that moved into the area about 90 minutes after the initial sighting. Following the report, the Air Technical Intelligence Center (ATIC) requested further investigation, seeking specific details on the elevation, azimuth, and flight paths of the objects to clarify the nature of the event. The subsequent analysis concluded that the sighting was not an anomalous craft but rather the result of a temperature inversion. This meteorological phenomenon was deemed responsible for creating mirage effects that affected both the radar equipment and the visual observations of the witnesses. The report notes that while the objects were tracked, the information available did not permit a more definitive explanation beyond the temperature inversion theory. The documentation includes the original Project 10073 record card, incoming staff messages, and an analysis sheet summarizing the findings.