Evolution of the three principal spatial dimensions of the debris cloud λ_i with time during the first two simulation stages. Solid symbols belong to S1, and open ones to S2. Green squares are λ₃ (vertical direction). Black circles and red diamonds correspond, respectively, to λ₁ (close to the propagation direction) and λ₂. The sudden switch between λ₁ and λ₂ near t = 2.5 days is related to the gradual rotation of the principal axes with respect to the direction of motion. Horizontal dotted green lines are half-sizes of the simulation boxes. The pericenter passage is shown with a vertical blue line. A purple dotted–dashed line shows the distance between the star and the BH r_*(t) as a function of time along the initial orbit.