|
|||||
|
|
Impact cratering and break up of the small bodies of the Solar System |
|
| Authors: | J Leliwa-Kopystyński MJ Burchell D Lowen |
| Institution: | a Warsaw University, Institute of Geophysics, Pasteura 7, 02-093 Warszawa, Poland b Space Research Centre of Polish Academy of Sciences, Bartycka 18A, 00-716 Warszawa, Poland c Centre for Astrophysics and Planetary Sciences, University of Kent, Canterbury, Kent, CT2 7NH, UK |
| Abstract: | We consider the largest impact craters observed on small satellites and asteroids and the impact disruption of such bodies. Observational data are considered from 21 impact-like structures on 13 satellites and 8 asteroids (target body radii in the range 0.7-265 km). If the radius of the target body is R and the diameter of the largest crater observed on this body D, the ratio D/R is then the main observational parameter of interest. This is found on the observed bodies and compared to data obtained in the laboratory. Taking the largest observed value for D/R as a proxy for the ratio Dc/R (where Dc is the diameter of the largest crater that can be formed on a body without shattering it) it was found that for the observed icy satellites Dc,icy≈1.2R and for the asteroids and the rocky satellites Dc,rocky≈1.6R. In laboratory experiments with ice targets at impactor speeds of 1 to 3 km s−1 we obtained Dc,icy≈1.64R. |
| Keywords: | Asteroids Collisional physics Impact processes Asteroids surfaces Satellites surfaces |
| 本文献已被 ScienceDirect 等数据库收录！ | |