I would like to have a nice picture/simulation of the Earth - Apophis encounter on April 13th 2029. I found this applet http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=aPOPHIS;orb=1;cov=0;log=0;cad=0#orb but it seems to produce too great error for the time of encounter - the minimal distance much greater than the one currently predicted and the asteroid is depicted to pass the Earth's orbit in front of the Earth, which seems wrong - the semi-major axis of the asteroid is supposed to increase. There is also the applet on John Walker's page http://www.fourmilab.ch/cgi-bin/Solar/action?sys=-Si but I do not know how to get correct orbital elements for it from the available data. Does anybody know of a good accessible way to draw accurate orbit diagram for this encounter? Or any similar applet/ application that draws orbits?