Cone-shaped UFO sighted in Argentina 1957

Summary

A luminous object with a conical shape was sighted in Argentina in 1957, with a brightness greater than a first-magnitude star. It was observed for five minutes, moving from north to south and then west, disappearing behind a mountain range. This sighting was reported by the Argentine army and air force, and it was considered possibly a satellite or an unidentified aircraft.

The report, classified under Project 10073, includes conclusions suggesting the object could be a balloon, an aircraft, or an astronomical phenomenon, but no definitive evaluation was reached. The lack of photographic evidence and precise data limited the analysis. Despite this, the case remains interesting due to its detailed description and the location of the sighting.