YR4, which orbits the sun every four years and periodically crosses Earth's orbit. The nature of its orbit makes it a ...
See multiple views from the Hayabusa2 spacecraft's touching down on asteroid 162173 Ryugu. Credit: JAXA/U. Tokyo/Kochi U./Rikkyo U./Nagoya U./Chiba Inst. Tech./Meiji U./U. Aizu/AIST ...