Project 10073 Record Card — Pittsburgh, Pennsylvania, 23 July 1955

This document consists of two record cards, identified as Project 10073 and AISS-UFOB-240-55, documenting a civilian sighting of an unidentified aerial object in Pittsburgh, Pennsylvania, on July 23, 1955. The witness reported observing a single, round, light-colored object at an estimated altitude of 200 feet. The object was described as stationary and remained in view at the time the report was filed. The documentation notes that there was no original report in the file, which initially hindered a formal evaluation. The investigating personnel provided a retrospective analysis, suggesting that the object was likely a balloon. This conclusion was supported by the observation that the object remained stationary for a long period and appeared close to the observer. The investigators further speculated that the reflection of city lights could explain the object's color and that the timing of the sighting aligned with the standard launch schedule for rawinsonde balloons in the hour preceding the report. Despite the initial uncertainty and the lack of a primary case file, the final assessment leaned toward a conventional explanation involving meteorological equipment.