Cylindrical UFO sighted in Uruguay in 1958

Summary

An observer in Uruguay reported in 1958 a cylindrical object that remained stationary for over 95 minutes, accompanied by a low humming noise. Although initially compared to a meteor, the duration of the phenomenon ruled out that possibility. The object had no wings or tail, and its sudden movement caused changes in its relative position to the horizon. Investigators concluded it could be a balloon, an aircraft, or an astronomical phenomenon, but insufficient data prevented a definitive evaluation.

The report details that the object was seen by multiple witnesses and its description includes a cylindrical shape, absence of conventional structures, and unusual behavior. Despite consistent observations, the lack of physical or photographic evidence prevented confirmation of its nature. The case was filed as insufficient for a conclusive evaluation, but remains an interesting example of how sightings were analyzed in the 1950s.