Abstract
Usually the formation of craters is circular and almost symmetric. However, many observations show an asymmetric crater formation, like on Moon [1], Lutetia [2] and Vesta [3]. How these craters form is still unclear. Erosion, tectonics, oblique impacts or topography may play an important role in the formation of those craters. Vesta exhibits a significant number of craters impacing on sloping tsurfaces [3,4] with unusual an asymme trical shape .There is no significant erosion or tectonics on Vesta, so it has to be an oblique impact and o r the influence of topography . We combined numerical modeling and geological observations to constrain the origin of the asymmetric craters on Vesta in order to prove whether topography was the dominant influence.
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