Left: Snapshots of the temperature field of the binary asteroids. Diagrams (a)–(d) illustrate the anti-clockwise orbit of the secondary asteroid around the primary. Both the primary and secondary have spin rates of 3 hours. The other properties of the binary system are detailed in Sect. 4.1. In phase (a) the primary is partially eclipsed by the secondary, while in phase (c) the primary fully eclipses the secondary. Right: Tangential accelerations due to thermal forces for the primary (blue) and secondary (red). The eclipse periods are represented by shaded areas.