Old UFO Sighting At Atuel River Mendoza

Here's a quick old photo of a UFO spotted at the Atuel River in Mendoza. The witness said it was like a fireball flying across the sky. I wonder if this was just how bright the UFO was when in operation (glowing), or if it was actually in trouble and ultimately going to end up making a crash land somewhere in Argentina. Does anyone know the follow up to this sighting? I seem to have forgotten the picture takers name as it has been many years since this sighting.