Project 10073 Record Card — Shiroi AB, Japan, 10 November 1957

This document is a Project 10073 record card and associated U.S. Air Force Technical Information Sheet detailing a UFO sighting reported by a 31-year-old Provost Sergeant at Shiroi Air Base, Japan, on the night of November 10, 1957. The witness observed a single object for approximately 1.5 minutes. The object was described as round or elliptical in shape, cream to white in color, and appeared fuzzy or blurred. The witness reported that the object hovered and moved in front of high-altitude clouds while rising toward the northwest. The object eventually faded out and changed in brightness during the observation. The witness explicitly noted that there was no sound associated with the object. The witness was outside at the time of the sighting and used 7x50 M-17 binoculars to observe the phenomenon. In the additional remarks, the witness noted that they had taken color photographs of the eclipse and would make them available upon return from the processors in New York. The official conclusion recorded on the project card is that there was insufficient data for evaluation, noting that while the description resembles a balloon, the short duration of the observation precluded a more definitive identification.