🇺🇸 USAF — Project Blue Book
A civilian observer saw an oblong object, the size of a pencil held at arm's length, stationary at about 5,000 feet. The sighting occurred on February 12, 1957, while the witness was driving between Valley Forge and Coatsville, Pennsylvania. The object remained visible for 18 minutes, suggesting it could be a balloon. The description and duration led investigators to conclude it was likely a balloon, though no photos or radar data were recorded to confirm it.
The lack of additional data, such as movement or clear identification, limited the evaluation. However, the elements of the report, including shape, size, and stillness, fit with a weather balloon. This case, though brief, is another example of how UFO reports often resolve with conventional explanations, though not always conclusive.