Project 10073 Record Card — San Gabriel, California, 19 May 1955

On May 19, 1955, at 0445Z, a civilian witness in San Gabriel, California, observed a single, round, white object in the sky. The sighting lasted for approximately five minutes. The object was described as moving slowly toward the west while gaining altitude. The observation occurred under clear night conditions. The report was processed under Project 10073 and documented on an ATIC Form 329 and an AISOP Form 5. Military communications, specifically a message from the 669th ACWRON, confirmed the details of the sighting, noting the object's appearance and trajectory. The official conclusion reached by the evaluating agency was that the object was definitely a balloon. Consequently, no further investigation was authorized regarding this incident. The documentation includes a record card, an index card, and a teletype message summarizing the event. Additionally, the file contains a note regarding an artifact located in an artifact room and a reference to a physical specimen from an Alexandria, Minnesota, sighting, which is noted to be in the following folder.