R. Honda

TL;DR: The Hayabusa2 spacecraft measured the mass, size, shape, density, and spin rate of asteroid Ryugu, showing that it is a porous rubble pile, and observations of Ryugu's shape, mass, and geomorphology suggest that Ryugu was reshaped by centrifugally induced deformation during a period of rapid rotation.

TL;DR: The Hayabusa2 team's study of the near-Earth carbonaceous asteroid 162173 Ryugu, at which the spacecraft arrived in June 2018, describes Ryugu's geological features and surface colors and combined results from all three papers to constrain the asteroid's formation process.

TL;DR: Watanabe et al. as discussed by the authors used a few hundred Optical Navigation Camera (ONC) images with a pixel scale of approximately 0.65 m, focusing on boulders greater than 5'm in diameter.

TL;DR: Images from the Mobile Asteroid Surface Scout lander show that rocks on asteroid Ryugu are similar to carbonaceous chondrite meteorites, and close-up images of a rock reveal a dark matrix with small, bright, spectrally different inclusions, implying that it did not experience extensive aqueous alteration.

TL;DR: Tachibana et al. as discussed by the authors analyzed the morphological properties of small pebbles on the asteroid and concluded that they are representative samples of the asteroid's surface and subsurface.