Fig. 1
Evolution of the Earth’s eccentricity uncertainty δe in S0a,b (dotted line) and S5a,b (solid line). In both cases, the initial difference at t = 0 is δe = 1.4 × 10-12. The thin solid line, with slope −1/10 represents the secular chaotic behavior (Laskar 1989, 1990). The eccentricity solution loses its validity when its uncertainty approaches its averaged value (δe ≈ 0.03).
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