I got the attached picture from a weather satellite frame (GOES 10) http://satelite.cptec.inpe.br/acervo/loop/loop.jsp?id=5726&idFonte=61&top=3&idProd=2011&idProjecao=2 ).Near 45º05’S and 59º 12’W exactly at 14:45 UTC you can see a little spot which enlarged at 150% zoom looks like an diamond shape UFO beneath earth add GOES10.