UFO Sighting Report — San Antonio, Texas, 12 July 1964

This document is an official Department of the Air Force incoming message, dated 16 July 1964, regarding a UFO sighting report from San Antonio, Texas. The incident occurred on 12 July 1964 at 2150Z. A civilian witness, identified as a salesman and deemed 'fairly reliable,' reported observing a yellow, crescent-shaped object while driving. The witness described the object as appearing to be the size of a baseball, which split into two halves, with the top and bottom halves disappearing alternately before reforming into an unbroken crescent shape. The object was observed for approximately fifteen minutes at an elevation of roughly 15 degrees. The witness did not stop their vehicle during the observation and had no optical aids. The report includes detailed weather data from Randolph AFB, noting clear skies with some clouds and a shallow inversion at approximately 1500 feet. The Flying Safety Officer's preliminary analysis concluded that the object was the quarter moon. The report suggests that the crescent shape, the position at an azimuth of 280 degrees, and the atmospheric conditions—specifically the shallow inversion and cloud cover—created the visual illusion of the object splitting, disappearing, and fragmenting. The report further notes that the observer was driving and lacked specialized training in aeronautical or meteorological phenomena. Military and civilian agencies in the area reported no other activity that would indicate an aerospace-related event.