Code: !$$SOF EMAIL_ADDR='' START_TIME = '2006-Mar-13 17:30:58' STOP_TIME = '2006-Mar-13 17:30:59' TABLE_TYPE = 'Vector' REF_PLANE = 'Ecliptic' CENTER = '@010' COMMAND='199' !$$EOF

Code: ******************************************************************************* $$SOE 2453808.229837963 = A.D. 2006-Mar-13 17:30:58.0000 (CT) [b]-5.730179611929864E+07 1.963895677831354E+06 5.419068833578369E+06 -1.179887453107446E+01 -4.658790336366766E+01 -2.723342317439528E+00[/b] 1.921027750084662E+02 5.759096310840907E+07 9.894693725010404E+00 $$EOE *******************************************************************************

Write an e-mail to JPL Horizons system asking for the positions and velocities of any solar system object relative to any other solar system object at any given time. Use the template below. Make sure that your STOP TIME is 1 s after your START TIME.Center = '@###'Command = '###'Center is the object you're referencing your positions and velocities against. Command is the object you want data for.ID's: 199 = Mercury, 299 = Venus, 399 = Earth... 999 = Pluto, etc.301 = 1st Moon of Earth, 401 = 1st Moon of Mars, 402 = 2nd moon of Mars, etc.010 = SunSo for example, the following e-mail asks for Mercury's (199) position and velocity relative to the Sun (010)Address the e-mail to horizons@ssd.jpl.nasa.gov Put the wordin the subject line.JPL's response e-mail, usually instant, gives you lots of data. Search for this:Notice the 6 numbers I've highlighted. They are the x,y &z positions of Mercury with respect to the Sun, and the x,y,& z velocities of Mercury with respect to the Sun. The 8th of those 9 numbers is the actual Mercury/Sun distance, which you can also compute with d=x+y+z