UFO Circling Sighted in Colorado in 1957

Summary

In December 1957, a witness in Englewood, Colorado, observed an object flying in a circle for between 1 and 2 minutes. The sighting was reported at 00:35 local time and came from a civilian source. Despite the clear description of the circular movement, no photos were taken and no additional report was filed.

Investigators concluded that the data was insufficient for a precise evaluation. Possible explanations such as balloons, aircraft, or astronomical phenomena were ruled out. The case remains unresolved, adding to the list of sightings that raise more questions than answers.