Project 10073 Record Card: Porto Alegre, Brazil, 5 December 1957

On December 5, 1957, at 13:00 local time, military personnel at a regional headquarters in Porto Alegre, Brazil, observed an unidentified object in the sky. The sighting occurred while troops were practicing. Initially, the observers considered the object to be a planet, such as Mars or Venus, due to its appearance. Major Firmino, the chief of the Communications Service, utilized binoculars to examine the object more closely. He concluded that it was not a known planet, noting that its shape resembled two superimposed bells and that its distance from the earth appeared relatively small. The observation involved several other officers, including Colonel Ovidio, Majors Luiz Artur and Alonço, and Captains Joalbo and Ramos. According to reports, the object was observed to divide into two parts. The lower portion moved toward the earth and then traveled south, while the remaining part stayed in its original position for some time before following the first. A newspaperman named Newton Calmon arrived at the scene and reported that the metallic body of the object resembled aluminum. Following the event, the military personnel involved declined to provide further statements to the press. The incident was documented in a Project 10073 record card and an Air Intelligence Information Report, which concluded that there was insufficient data for a formal analysis.