Project 10073 Record Card — Spencer, Wisconsin, 2 September 1955

This document consists of a Project 10073 record card and an associated military teletype report regarding an unidentified aerial phenomenon observed on September 2, 1955, in Spencer, Wisconsin. The report, filed by the 67th ACW Squadron in Antigo, Wisconsin, details a sighting by two civilian witnesses. The object was described as a round, white light that turned bright orange before disappearing. The witnesses reported that the object appeared to be suspended from a balloon. The duration of the observation was one hour and fifty minutes. The military investigation, conducted by the Air Technical Intelligence Center (ATIC), noted that the reported altitude was 5,000 feet and that the weather conditions were clear with 15 miles of visibility. The investigators considered the possibility of an astronomical body, specifically the star Spica, but concluded that it would not have been visible or bright enough at the reported time of 1840 local, given the position of the sun on the horizon. Because of the lack of positional data and the inability to correlate the sighting with known phenomena, the official conclusion was that there was insufficient data for a formal evaluation.