Equilibrium and zero-velocity curves (ZVCs) around Phaethon. Phaethon’s outline is shown with the yellow lines. The ZVCs are represented by gray lines, with larger V values shown with darker hues. The ZVC interval for the left panel was adjusted to enhance the geopotential around the EPs The dotted red lines are the ZVCs of the minimum geopotential outside of Phaethon, also known as the “rotational Roche lobe” (Scheeres 2012).