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Fig. 4

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Short-term time evolution of the values of the geocentric distance and energy for the nominal orbit of 2023 FY3. The evolution of the geocentric distance is displayed in black (left-side scale). The value of the Hill radius of Earth, 0.0098 au, is plotted as a dashed red line. The evolution of the geocentric energy is displayed in green (right-side scale). The zero level is shown as a continuous red line. Captures take place when the value of the geocentric energy becomes negative. The unit of energy is such that the unit of mass is 1 M, the unit of distance is 1 au, and the unit of time is one sidereal year divided by 2π. The output cadence is 4.383 h.

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