Observed non-gravitational acceleration in the cometary equatorial frame, magnitude (upper panel), and corresponding latitude and longitude of the direction of the sublimation force (lower panel). The latitude ϕD is correlated with the anti-solar latitude (− ϕsun) (black line in the lower panel), while the longitude correlates with the night terminator λD = 180°. The shaded band indicates the variation across the set of initial conditions. The red graph in the upper panel shows the ROSINA-derived water production of 67P from Läuter et al. (2019).
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