Astrocentric positions of the HR 8799 planets over 1 Gyr N-body integration presented in the orbital plane corotating with HR 8799b. The red, green, and blue curves illustrate the orbits of HR 8799e, d, and  c, respectively. Big red, green, blue, and magenta symbols mark the positions of planets e, d, c, and b during the conjunction of planets b and c, while smaller symbols denote the positions during their opposition. The yellow symbol at the origin marks the parent star.