Project 10073 Record Card and Related Correspondence Regarding Sputnik IV Decay

This document collection details the recovery and analysis of metal fragments found in various locations across the United States in September 1962, which were initially reported as Unidentified Aerial Phenomena (UAP). The primary incident involves a farmer in Quincy, Washington, who discovered a piece of metal in his field on 4 September 1962. This was subsequently forwarded to the Air Force for analysis. Other reports in the file describe sightings of flaming objects in the sky over Wisconsin and North Dakota, involving multiple witnesses, including airline pilots and military personnel. The Air Force investigation, conducted under Project 10073, consistently concluded that these sightings and the recovered debris were associated with the decay and atmospheric re-entry of the Soviet satellite Sputnik IV. Laboratory analysis of the recovered fragments, including the piece from Washington and others from Wisconsin, identified them as aluminum alloy or alloy steel, consistent with man-made satellite construction rather than extraterrestrial origin. The documents include official record cards, correspondence between military units such as the 4170th Strategic Wing and the Air Technical Intelligence Center (ATIC), and press clippings discussing the recovery of the fragments and the subsequent diplomatic interactions at the United Nations regarding the debris.