Special Issue: Itokawa-Hayabusa and beyond
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Impact process of boulders on the surface of asteroid 25143 Itokawa—fragments from collisional disruption
Earth, Planets and Space volume 60, pages 7–12 (2008)
Abstract
The subkilometer-size asteroid 25143 Itokawa is considered to have a gravitationally bounded rubble-pile structure. Boulders appearing in high-resolution images retrieved by the Hayabusa mission revealed the genuine outcome of the collisional event involving the asteroid’s parent body. Here we report that the boulders’ shapes and structures are strikingly similar to laboratory rock impact fragments despite differences of orders of magnitude in scale and complexities of the physical processes. These similarities suggest the universal character of the process throughout the range of these scales, and the brittle and structurally continuous nature regarding the parent body of the boulders. The similarity was likely preserved because of relatively lesser comminuting processes acting on individual boulders; the close assemblages of similar appearing boulders (a boulder family) represent the impact destruction of boulders on the surface.
References
Abe, S. et al., Mass and local topography measurements of Itokawa by Hayabusa, Science, 312, 1344–1346, 2006.
Aspahug, E., E. V. Ryan, and M. T. Zuber, Asteroid interiors, in Asteroids III, edited by W. F. Bottke Jr, A. Cellino, P. Paolicchi, and R. P. Binzel, 463 pp., Univ. Arizona Press, Tucson, 2002.
Benz, W. and E. Asphaug, Impact simulations with fracture, I—Method and tests, Icarus, 107, 98–116, 1994.
Bottke Jr., W. F., M. C. Nolan, R. Greenberg, and R. A. Kolvoord, Velocity distributions among colliding asteroids, Icarus, 107, 255–268, 1994.
Bottke Jr., W. F. et al., Linking the collisional history of the main asteroid belt to its dynamical excitation and depletion, Icarus, 179, 63–94, 2005.
Brown, P. et al., The orbit, atmospheric dynamics, and initial mass of the Park Forest meteorite, Meteorit. Planet. Sci., 39, 1781–1796, 2004.
Chapman, C. R. and D. R. Davis, Asteroid collisional evolution—Evidence for a much larger early population, Science, 190, 553–556, 1975.
Chapman, C. R., W. J. Merline, P. C. Thomas, and J. Joseph, Impact history of Eros: Craters and boulders, Icarus, 155, 104–118, 2002.
Davis, D. R. et al., The formation and collisional/dynamical evolution of the Ida/Dactyl system as part of the Koronis family, Icarus, 120, 220–230, 1996.
Demura, H. et al., Pole and global shape of 25413 Itokawa, Science, 312, 1347–1349, 2006.
Fujiwara, A. et al., The rubble-pile asteroid Itokawa as observed by Hayabusa, Science, 312, 1330–1334, 2006.
Giblin, I. et al., The properties of fragments from catastrophic disruption events, Icarus, 134, 77–122, 1998.
Hartmann, W. K., Planet formation: Mechanism of early growth, Icarus, 33, 50–61, 1978.
Holsapple, K., I. Giblin, K. Housen, A. Nakamura, and E. Ryan, Asteroid Impacts: Laboratory Experiments and Scaling Laws, in Asteroids III, edited by W. F. Bottke Jr, A. Cellino, P. Paolicchi, and R. P. Binzel, 443 pp., Univ. Arizona Press, Tucson, 2002.
Housen, K. R., Crater ejecta velocities for impacts on rocky bodies, LPSC XXIII abst., 555–556, 1992.
Housen, K. R. and K. A. Holsapple, Scale effects in strength-dominated collisions of rocky asteroids, Icarus, 142, 21–33, 1999.
Ishiguro, M. et al., Global mapping of the degree of space weathering on asteroid 25143 Itokawa by Hayabusa/AMICA observations, Meteoritics & Planet. Sci., 2007 (in press).
Michel, P., W. Benz, and D. C. Richardson, Disruption of fragmented parent bodies as the origin of asteroid families, Nature, 421, 608–611, 2003.
Michikami, T., K. Moriguchi, S. Hasegawa, and A. Fujiwara, Ejecta velocity distribution for impact cratering experiments on porous and low strength targets, Planet. Space Sci., 55, 70–88, 2007.
Nakamura, A. and A. Fujiwara, Velocity distribution of fragments formed in a simulated collisional disruption, Icarus, 92, 132–146, 1991.
Nakamura, A. M., Laboratory studies on the velocity of fragments from impact disruptions, ISAS Report, 651, 1993.
Nakamura, A. M., P. Michel, and M. Setoh, Weibull Parameters of Yakuno Basalt Targets Used in Documented High-Velocity Impact Experiments, J. Geophys. Res. (Planets), 112, 10.1029/2006JE002757, 2007.
O’Brien, D. P. and R. Greenberg, The collisional and dynamical evolution of the main-belt and NEA size distributions, Icarus, 178, 179–212, 2005.
Polanskey, C. A. and T. J. Ahrens, Impact spallation experiments: Fracture patterns and spall velocities, Icarus, 87, 140–155, 1990.
Richardson, D. C., Z. M. Leinhardt, H. J. Melosh, W. F. Bottke Jr., and E. Asphaug, Gravitational Aggregates: Evidence and Evolution, in Asteroids III, edited by W. F. Bottke Jr, A. Cellino, P. Paolicchi, and R. P. Binzel, 501 pp., Univ. Arizona Press, Tucson, 2002.
Richardson Jr., J. E., H. J. Melosh, R. J. Greenberg, and D. P. O’Brien, The global effects of impact-induced seismic activity on fractured asteroid surface morphology, Icarus, 179, 325–349, 2005.
Saito, J. et al., Detailed images of asteroid 25143 Itokawa from Hayabusa, Science, 312, 1341-1344, 2006.
Setoh, M., A. M. Nakamura, N. Hirata, K. Hiraoka, and M. Arakawa, Collisional disruption of weakly sintered porous targets at low-impact velocities, Earth Planets Space, 59, 319–324, 2007.
Thomas, P. C., J. Veverka, M. S. Robinson, and S. Murchie, Shoemaker crater as the source of most ejecta boulders on the asteroid 433 Eros, Nature, 413, 394–396, 2001.
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Nakamura, A.M., Michikami, T., Hirata, N. et al. Impact process of boulders on the surface of asteroid 25143 Itokawa—fragments from collisional disruption. Earth Planet Sp 60, 7–12 (2008). https://doi.org/10.1186/BF03352756
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DOI: https://doi.org/10.1186/BF03352756