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Fig. 9
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Contour map of the eccentricity excitation time TIa (e1,i, eı,f) for Type la drift in the J2:1 commensurability. The unit of TIa (e1,i, e 1,f) is Myr with e1,i = 0.2 and e1,f = aJ/aJ2:1 − 1 ≈ 0.59. The diameter D of the asteroid is fixed as 35 m, and the spin period is fixed as 600 s.
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