Air Intelligence Information Report: Unconventional Airborne Object Sighting, 29 March 1952

This document is an Air Intelligence Information Report (IR-23-52) dated 10 April 1952, concerning an unidentified aerial object sighting near Misawa, Japan, on 29 March 1952. The primary report details an incident involving an Air Force pilot flying a T-6 aircraft at 6,000 feet. While the pilot was conducting an intercept exercise with two F-84 aircraft, he observed a small, shiny, disc-shaped object that appeared to make a pass at the F-84s. The pilot described the object as approximately eight inches in diameter, very thin, and as shiny as polished chromium. The object reportedly closed rapidly, decelerated to the pilot's airspeed, flipped on its edge at a 90-degree bank, and fluttered within 20 feet of his fuselage for several seconds before accelerating and climbing vertically out of sight. The pilot of the F-84 aircraft involved in the intercept did not observe the object. The report includes a formal comment from the Office of Naval Intelligence (DIO 11 ND Serial 67-52), which suggests that while the source reported factual data, the object was likely a jet aircraft. The ONI comment notes that jet aircraft with afterburners can emit a bluish-white exhaust that might appear elongated, and that the originating agency failed to check the report against known flight patterns of jet aircraft in the area at the time. The report also includes a hand-drawn sketch (Enclosure 1b) showing the object's path relative to Polaris and the handle of the Big Dipper, with a note comparing its size to Venus and its light output to an average meteor. The document concludes that the sighting remains unsolved, with the official explanation being the possible reflection and refraction of light through the observer's aircraft canopy. The report also contains a brief mention of a separate sighting of two fiery disks over uranium mines in the Belgian Congo on 29 March 1952, which were observed by a commander of the Elisabethville airfield.