21 citations · 72 across the 9 of their papers we have counts for
6 papers · 1 filter
Formation of moons and equatorial ridge around top-shaped asteroids after surface landslide
Ryuki Hyodo, Keisuke Sugiura
Top-shaped asteroids have been observed among near-Earth asteroids. About half of them are reported to have moons (on the order of wt.\% of the top-shaped primary) and many…
Giant Impact onto a Vesta-Like Asteroid and Formation of Mesosiderites through Mixing of Metallic Core and Surface Crust
Keisuke Sugiura, Makiko K. Haba, Hidenori Genda
Mesosiderites are a type of stony-iron meteorites composed of a mixture of silicates and Fe-Ni metals. The mesosiderite silicates and metals are considered to have originated from…
SPH Simulations for Shape Deformation of Rubble-Pile Asteroids Through Spinup: The Challenge for Making Top-Shaped Asteroids Ryugu and Bennu
Keisuke Sugiura, Hiroshi Kobayashi, Sei-ichiro Watanabe +3
Asteroid Ryugu and asteroid Bennu, which were recently visited by spacecraft Hayabusa2 and OSIRIS-REx, respectively, are spinning top-shaped rubble piles. Other axisymmetric top-sh…
High-Resolution Simulations of Catastrophic Disruptions: Resultant Shape Distributions
Keisuke Sugiura, Hiroshi Kobayashi, Shu-ichiro Inutsuka
The members of asteroid families have various shapes. We investigate the origin of their shapes by high-resolution impact simulations for catastrophic disruptions using a Smoothed…
Collisional Elongation: Possible Origin of Extremely Elongated Shape of 1I/`Oumuamua
Keisuke Sugiura, Hiroshi Kobayashi, Shu-ichiro Inutsuka
Light curve observations of a recently discovered interstellar object 1I/`Oumuamua suggest that this object has an extremely elongated shape with the axis ratio 0.3 or smaller. Pla…
Toward Understanding the Origin of Asteroid Geometries: Variety in Shapes Produced by Equal-Mass Impacts
Keisuke Sugiura, Hiroshi Kobayashi, Shu-ichiro Inutsuka
More than a half of asteroids in the main belt have irregular shapes with the ratios of the minor to major axis lengths less than 0.6. One of the mechanisms to create such shapes i…