Project 10073 Record Card — Gurnee, Illinois, 1960

This document contains a collection of correspondence and a Project 10073 record card regarding a UFO sighting reported by a civilian in Gurnee, Illinois, in late 1960. The witness, who had been observing the 'Echo' balloon, reported seeing a bright, starlike object that appeared to move, wobble, and change colors from white to pale green, rose, and orange. The witness initially contacted the Strategic Air Command to inquire about the object. The Air Force responded by requesting the witness complete a formal questionnaire for analysis by the Aerospace Technical Intelligence Center at Wright-Patterson Air Force Base. The witness also corresponded with Frank C. Jettner, Jr., a staff astronomer at the Adler Planetarium, who suggested the object was likely a rocket carrier from a 'Discoverer' satellite launch, noting that such information was classified. The final Air Force evaluation concluded that the sighting was not an anomalous craft but rather the atmospheric refraction of a star or planet, noting that the perceived motion was likely an optical illusion common under such conditions.