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Table 3

Variation in the orbital eccentricity and semiaxis (in units of RN = 24   764 km) of the Neptunian irregulars due to Solar and giant planet perturbations over a period of 105 yrs. Δamin = amean − amin and Δamax = amax − amean.

Satellite e min e mean e max a min a mean a max Δamin Δamax

Nereid 0.7426 0.7496 0.7566 222.633 222.659 222.687 0.026 0.028
Halimede 0.2073 0.4331 0.9026 668.865 670.297 672.025 1.432 1.728
Sao 0.0628 0.2839 0.6619 892.175 896.893 902.070 4.718 5.177
Laomedeia 0.2648 0.4015 0.5482 942.266 948.295 955.526 6.029 7.231
Neso 0.0942 0.4140 0.8803 1919.790 2013.260 2130.300 93.470 117.040
Psamathe 0.0482 0.3970 0.9144 1832.740 1912.260 2015.540 79.520 103.280

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