Project 10073 Record Card — Yonkers, N. Y., 6 November 1957

This document is a Project 10073 Record Card detailing a sighting reported on November 6, 1957, in Yonkers, New York. The observer, identified only as a civilian, reported seeing a single, white, round object, described as being the size of a baseball. The object was observed for a duration of 30 seconds. According to the report, the object was initially stationary before moving North and then shifting its course to move from North to South. The observer estimated the object's speed to be between 2,500 and 3,000 miles per hour, with an altitude between 60,000 and 80,000 feet, and noted the presence of a vaportrail. The official evaluation of the report, recorded in the comments section, dismisses the account. The investigator noted that the reported speed and elevation were too extreme to be accurate, particularly given that the observation occurred at night. Consequently, the source was deemed unreliable, and the report was marked as 'Unreliable source' under the conclusions section of the card.