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Fig. 9
Phase portrait on the (Δω, e) plane. Upperpanel: β = 0.004 for L4, and lower panel: β = 0.05 for L5. The horizontal and vertical lines indicate ek and Δωk obtained by minimizing the libration amplitudes, which are 0.00644 and 55.90° for the upperpanel, 0.006355 and − 43.24° for the lower panel.
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