Projection of GJ 9827 on the sky plane is shown as viewed equator-on. The black arrow indicates the direction of the stellar spin axis, while the black line traces the stellar equator. The orbital plane normals of the three planets are indicated by the coloured arrows: green for planet b, orange for c, and purple for d. The stellar surface is colour-coded according to the projected radial surface velocity. The solid lines indicate the best-fit orbits for each planet, while the shaded lines illustrate randomly drawn orbits from each distribution of the semi-major axis, orbital inclination, and spin-orbit angle.