Project 10073 Record Card — Gillespie Field, San Diego, 9 June 1955

This document consists of a Project 10073 record card and a subsequent memo routing slip regarding a UFO sighting reported on 9 June 1955 at Gillespie Field, San Diego, California. The initial report, provided by a civilian source, described a round object, approximately 6 to 8 feet in diameter, observed at an estimated altitude between 10,000 and 20,000 feet. The object was reported to be drifting. The record card initially categorized the sighting as 'Possibly Balloon.' A follow-up memo dated 28 June 1955, authored by A/1c Ronald DeRudder of the 4602 AISS, provided additional context to the sighting report (AISS-UFOB-172-55). DeRudder noted that the 1110th Air Support Group at Lowry AFB had launched a 'Moby Dick' balloon on 6 June 1955. This balloon was tracked and subsequently plotted over San Diego on 10 June 1955, fifteen minutes after the reported sighting. The memo states that both the balloon and the reported UFO were traveling in a southwesterly direction. Based on this information, the investigating agency concluded that there was no change in the evaluation and maintained the classification of 'PROBABLY BALLOON.'