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Fig. 1

image

Nominal orbit of Hip 103738 (gamma Microscopii) relative to the Sun in Galactic cylindrical coordinates (r,z,φ) over the past 7.8 Myr. The bottom right panel is a zoom of the bottom left panel around the perihelion, and shows the discrete calculation steps in the numerical integration. The perihelion is refined from the closest point using the linear motion approximation. The difference in this case is 3.7 × 10-4 pc, or 77 AU.

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