Dinkinesh is a small asteroid orbiting the Sun near the inner edge of the main asteroid belt. NASA’s Lucy spacecraft recently revealed the asteroid, which has an effective diameter of only 720 m, to be unexpectedly complex: it has a prominent trough overlain by a equatorial ridge and is orbited by a contact binary satellite, now named Selam. This satellite consists of two near-equal-sized lobes with diameters of 210 m and 230 m. It orbits...
