کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1774975 | 1021180 | 2008 | 10 صفحه PDF | دانلود رایگان |
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/RD/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/RD/R as a proxy for the ratio Dc/RDc/R (where DcDc 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≈1.2RDc,icy≈1.2R and for the asteroids and the rocky satellites Dc,rocky≈1.6RDc,rocky≈1.6R. In laboratory experiments with ice targets at impactor speeds of 1 to 3 km s−1 we obtained Dc,icy≈1.64RDc,icy≈1.64R.
Journal: Icarus - Volume 195, Issue 2, June 2008, Pages 817–826