The Phemu 2015 campaign of observations of the mutual events of the Galilean satellites of Jupiter

International audienceFrom September 2014 to June 2015 mutual events of the Galilean satellites will occur around the Jovian equinox occurring on February 6, 2015. The observations of these events provide very accurate information on the relative astrometry of the satellites. Past campaign of observations have shown the high interest of such observations now performed mainly by amateur astronomers: the Galilean satellites are bright and the magnitude drop during these events is easily observable. The 2014-2015 campaign will be especially favorable because of the maximum of events which will occur during the opposition between the Sun and Jupiter. More, the positive declination of Jupiter will make the observations easier in the Northern hemisphere where many observers are available