Project 10073 Record Card and Incoming Message — Mosinee, Wisconsin, April 1964

This document consists of a Project 10073 Record Card and an associated Department of the Air Force incoming message regarding a UFO sighting reported by civilians in Wisconsin. On April 23, 1964, at 0235Z, a group of five students, aged 14 to 20, observed a small, white, starlike object moving in a straight line from North to South. The observation lasted approximately five minutes, with the object initially sighted at an elevation of 25 to 30 degrees above the horizon before disappearing in the distance. The witnesses were located on Highway 34, near the Marathon and Portage County line. The report was filed five days after the event. The investigation, conducted by 1st Lt. Charles R. Piver of the Chicago Air Defence Sector, concluded that the object was likely a visible satellite or a 'shooting star.' Comments on the record card specifically mention 'Echo II' over Wisconsin at 1938 and 2149 CST on April 22, 1964, suggesting the sighting was an observation of the Echo II satellite.