Arrokoth

Photographed by the New Horizon spacecraft.  

Arrokoth comes from a region of the Solar System called the Kuiper Belt, specifically from an area that's outside the gravitational influence of Neptune, the outermost large planet. In this region, there was enough material to form icy bodies, but it was spread so thinly that the bodies seem to have remained small, without interacting frequently enough to form larger planets. Neptune's influence scattered some of the Kuiper Belt objects further inward, where collisions with other bodies were more likely and the influence of the Sun was stronger. But Arrokoth currently orbits beyond the point where that was likely to happen. --- Ars Technica

                                                                                                                  Photo: NASA