Attached is a Excel program given a Date it will susposedly give the Keplarian data for each of the Planets. It does not work. The Data is given from Nasa JPL: http://ssd.jpl.nasa.gov/txt/p_elem_t2.txt Julian Date and J2000 are calculated. J2000 or just J is plugged into the JPL data: a-Semi-Major Axis e-Eccentricity i-inclination ML-Mean Longitude LP-Longitude of the Perihelion N-Longitude of the Ascending Node Calculated from the above are: MA-Mean Anomaly EA-Eccentric Anomaly w-Argument of the Perihelion r-Planet Radius from the Sun v-True Anomaly Equ-Equinox-On Mar 21 looking thru the Sun the angle it makes with the projected Perihelion The True Anomaly gives the approximate answer for all dates but my logic is flawed if you use the equation: vActual=Equ+N+w+v I have worked a long time on this. Any input would be much appreciated!!!