It was found by analyses of three images acquired in February 2004 from the 8.2 m VLT `` Yepun '' at the European Southern Observatory ( ESO ) Cerro Paranal , in Chile . It was discovered by analyses of three images acquired in February 2004 from the 8.2 m VLT `` Yepun '' at the European Southern Observatory ( ESO ) Cerro Paranal , in Chile .