from: https://ssd.jpl.nasa.gov/planets/approx_pos.html
valid for 1800 AD - 2050 AD, Earth is the EM barycenter
               a              e               i                L              longp           raan
           au, au/Cy     rad, rad/Cy     deg, deg/Cy      deg, deg/Cy      deg, deg/Cy     deg, deg/Cy
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Mercury   0.38709927      0.20563593      7.00497902      252.25032350     77.45779628     48.33076593
          0.00000037      0.00001906     -0.00594749   149472.67411175      0.16047689     -0.12534081
Venus     0.72333566      0.00677672      3.39467605      181.97909950    131.60246718     76.67984255
          0.00000390     -0.00004107     -0.00078890    58517.81538729      0.00268329     -0.27769418
Earth     1.00000261      0.01671123     -0.00001531      100.46457166    102.93768193      0.0
          0.00000562     -0.00004392     -0.01294668    35999.37244981      0.32327364      0.0
Mars      1.52371034      0.09339410      1.84969142       -4.55343205    -23.94362959     49.55953891
          0.00001847      0.00007882     -0.00813131    19140.30268499      0.44441088     -0.29257343
Jupiter   5.20288700      0.04838624      1.30439695       34.39644051     14.72847983    100.47390909
         -0.00011607     -0.00013253     -0.00183714     3034.74612775      0.21252668      0.20469106
Saturn    9.53667594      0.05386179      2.48599187       49.95424423     92.59887831    113.66242448
         -0.00125060     -0.00050991      0.00193609     1222.49362201     -0.41897216     -0.28867794
Uranus   19.18916464      0.04725744      0.77263783      313.23810451    170.95427630     74.01692503
         -0.00196176     -0.00004397     -0.00242939      428.48202785      0.40805281      0.04240589
Neptune  30.06992276      0.00859048      1.77004347      -55.12002969     44.96476227    131.78422574
          0.00026291      0.00005105      0.00035372      218.45945325     -0.32241464     -0.00508664
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