Presque Isle 1952, UFO sighted with theodolite

Summary

In October 1952, weather observers at Presque Isle, Maine, spotted an orange circular object with four green lights. They used a theodolite to measure its position, enabling precise triangulation. Readings indicated the object was over 300,000 feet high, ruling out aircraft or balloons. Further investigation revealed the object was actually the planet Jupiter, whose position matched the data after correcting a theodolite misalignment. This case is a classic example of how an astronomical phenomenon can be misinterpreted as a UFO due to technical errors or inexperience.

The significance of this incident lies in the methodology used: triangulation with theodolites was an early attempt to accurately measure the position of an unidentified object. Initially thought to be a spaceship or a Soviet balloon, the final explanation pointed to a human error in determining true north. This case also highlights the collaboration between different air bases and the subsequent review by experts, including astronomer Dr. J. Allen Hynek, who identified the object as Jupiter. The Presque Isle incident serves as a reminder of the need for scientific rigor in the investigation of unidentified aerial phenomena.