Project 10073 Record Card — Uruguay, 11 September 1958

This document is a Project 10073 record card and associated investigation file from the Centro de Investigacion de Objetos Voladores Inusuales (C.I.N.V.I.) in Uruguay. It details a sighting that occurred on September 11, 1958, at 20:35. The witness, a judicial official residing in Santa Lucia, Canelones, reported observing a blue-white, oblong object moving from West to East in a straight line. The witness noted that the object's color changed to a red hue, similar to the planet Mars, and that it maintained constant brilliance while moving rapidly before fading into the distance. The witness also reported that the object left a fine, long, blue-white trail. The investigation form confirms that there were no clouds, wind, or other meteorological conditions that might explain the sighting. The witness stated this was the third time they had observed such a phenomenon. Despite the detailed report, the official conclusion recorded on the Project 10073 card is that the data was insufficient for a definitive evaluation, suggesting the object could have been an aircraft or a satellite. A separate note included in the file explicitly states in Spanish that the case 'does not merit study attention.' The file also includes a list of observations from Porto Alegre, Brazil, noting various times and degrees above the horizon for sightings occurring between September 11 and September 17, 1958, suggesting a broader regional interest in these phenomena during that period.