Project Blue Book Case File
Detroit, MichiganJune 1961
Summary
On the night of June 6, 1961, an airman at Selfridge Air Force Base in Detroit watched an object move across the sky at extremely high speed. The object appeared egg-shaped at times and moved from west to east in a straight line. It was visible for three to four minutes. The airman first spotted it at an elevation of ninety degrees directly overhead and watched it disappear over the horizon to the east. The object made no sound and left no trail or exhaust.
A second sighting was reported the same night from the west side of Detroit. The observer, whose name the investigators had difficulty spelling, reported seeing a similar object moving very fast. This sighting occurred at 0245 (12:45 a.m.) on June 6. Investigators tried but failed to contact this witness to gather more details.
At Selfridge, radar operators searched for the object using two radar systems: the AN/FPS-20A search radar and the AN/FPS-6 height finder radar. They found nothing on radar that could not be explained by ordinary aircraft in the Detroit air defense sector. The weather was clear with good visibility, thin high clouds, and no thunderstorms in the area.
In their analysis, investigators concluded that the orbiting decline of the Echo satellite was the only possible explanation for the sightings. The Echo satellite's path crossed the Detroit area between the times of the reported sightings, and it would continue to pass over the region throughout June 1961. The Air Force classified the case as unidentified. The full case file is reproduced below as held by the National Archives across nine pages.
Reported location
Detroit, Michigan
Date of incident
June 1961
State / country
MI / US
Page count
9 scanned pages
USAF evaluation
unidentified
Microfilm
T1206, Roll 42