Project 10073 Record — Sighting in Green Bay, Wisconsin, 11 September 1968

This document contains the records for a UFO sighting reported on September 11, 1968, in Green Bay, Wisconsin. The primary witness, a 40-year-old male, reported observing a bright, orangish-yellow light for approximately 10 minutes. The witness, who was at home with his wife and daughter, initially mistook the object for a North Central Airlines plane but noted it lacked the expected flashing lights. The object traveled in a North-Northeast (NNE) direction before disappearing into the horizon behind trees. The witness completed an official Air Force 'Sighting of Unidentified Phenomena Questionnaire' (AF Form 117), providing sketches and details of the event. The Air Force's Foreign Technology Division (FTD) investigated the report, including checking with the 676th Radar Squadron and the 34th Air Division, neither of which had records of unidentified aerial activity in the area at that time. The official conclusion reached by the Air Force was that the object was a 'possible' hot air balloon, specifically a 'Garment Bag Hot Air Balloon,' noting that no evidence was presented to rule this out. However, the file also includes a note from J. Allen Hynek, the scientific consultant for the Air Force's UFO investigations, who expressed skepticism regarding the balloon conclusion. Hynek stated that it was impossible to definitively identify the object based on the provided data, suggesting that a satellite or a specially lighted aircraft were also likely possibilities, with his own guess leaning toward a satellite.