Project 10073 Record Card and Associated Incoming Messages — September 1960

This document collection comprises a series of incoming military messages and a Project 10073 record card detailing a significant aerial sighting event on September 15-16, 1960, over Puerto Rico and the Caribbean. Numerous observers, including military personnel at Ramey Air Force Base, civilian observers in San Juan, and crews aboard vessels such as the USNS Geiger and the MS Mormacwren, reported a bright, unidentified object or cluster of objects moving from south to north. Descriptions consistently characterized the phenomenon as a large, bright light or a round object with a long, reddish tail, which appeared to break up into approximately fifteen to twenty smaller fireballs or streaks. The duration of the sightings varied, with some reports indicating the objects were visible for 10 to 90 seconds. Military observers at Ramey AFB noted the objects appeared at an elevation of 45 to 80 degrees and moved in a straight, level flight path. Despite the high volume of reports, no radar contact was confirmed, and no physical evidence was recovered. The official evaluation, documented on the Project 10073 record card, suggests the phenomenon was likely a very slow meteor or, more probably, the atmospheric reentry of the 1960 Epsilon space vehicle. The report notes that Epsilon's orbital inclination of 64 degrees would result in a heading of approximately 26 degrees, which aligns with the observed trajectory. The documentation includes detailed interrogation summaries of military personnel, including a major, a master sergeant, and an aircraft maintenance superintendent, all of whom were considered reliable witnesses. The event was also cross-referenced with Project Moon Dust protocols. The reports emphasize that the objects passed directly over San Juan and were observed by multiple independent parties, including pilots and ground-based observers, reinforcing the consistency of the accounts despite the lack of physical or radar-based confirmation.