Relative orbit of the compact object around the optical star in IGR J00370+6122 as seen from above the orbital plane. The position of periastron is indicated and joined to the apastron by the straight line depicting the major axis of the orbit. The shaded area signals the approximate size of the supergiant, and the small ellipse inside it represents its orbital motion around the centre of mass. The coordinates are in solar radii and represent projected distances.