36 citations · 159 across the 14 of their papers we have counts for
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Bundle adjustment of Hayabusa2's ONC images and controlled color mosaic map of Ryugu
Naoyuki Hirata, Eri Tatsumi, Mayumi Ichikawa +2
JAXA's Hayabusa2 mission successfully returned samples from the asteroid Ryugu in December 2020. It executed two touchdowns to collect the surface and subsurface materials, one clo…
Secondary cratering from Rheasilvia as the possible origin of Vesta's equatorial troughs
Naoyuki Hirata
Asteroid 4 Vesta has a set of parallel troughs aligned with its equator. Although previous evaluations suggest that it is of shock fracturing tectonic origin, we propose that the e…
Particle deposition on the saturnian satellites from ephemeral cryovolcanism on Enceladus
Naoyuki Hirata, Hideaki Miyamoto, Adam P. Showman
The geologically active south pole of Enceladus generates a plume of micron-sized particles, which likely form Saturn's tenuous E-ring extending from the orbit of Mimas to Titan. I…
Timing of the faulting on the Wispy Terrain of Dione based on stratigraphic relationships with impact craters
Naoyuki Hirata
The trailing hemisphere of Dione is characterized by the Wispy Terrain, where it exhibits a hemispheric-scale network of extensional tectonic faults superposed on the moon's crater…
Rayed craters on Dione: Implication for the dominant surface alteration process
Naoyuki Hirata, Hideaki Miyamoto
From recently-acquired, high-resolution images obtained by the Cassini spacecraft, we examine the patterns and spatial distributions of rayed craters on Dione. We identify 29 rayed…
The spatial distribution of impact craters on Ryugu
Naoyuki Hirata, Tomokatsu Morota, Yuichiro Cho +40
Asteroid 162173 Ryugu has numerous craters. The initial measurement of impact craters on Ryugu, by Sugita et al. (2019), is based on Hayabusa2 ONC images obtained during the first…