Project 10073 Record Card and Teletype Report — Riverside, California, December 1955

This document consists of a Project 10073 record card and an associated teletype report detailing an unidentified aerial phenomenon observed on December 24, 1955, in Riverside, California. The primary witness, identified as a civilian assembly worker, reported seeing a single, round, red object that appeared to be the size of a dime. The object was initially stationary at an estimated altitude of 9,000 feet before it departed at a speed of approximately 300 mph in a northeasterly direction. The observation lasted between five and fifteen minutes. The report was filed by the Commander of the 669th ACWRON and directed to various military commands, including the Air Technical Intelligence Center at Wright-Patterson Air Force Base. Military officials conducted a review of local air traffic and confirmed that no known aircraft could be correlated with the sighting. Specifically, the report notes that while a T-33 aircraft (AF53925) from Selfridge Air Force Base was under their control at the time, it was located between Palmdale and Oxnard on a 240-degree heading, effectively ruling it out as the source of the sighting. Due to the lack of corroborating radar data or further physical evidence, the official conclusion reached by the investigating authorities was that there was insufficient data for a definitive evaluation of the object's nature.