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The surface and interior of PhobosThe impact crater Stickney dominates one hemisphere of the Martian moon Phobos; its diameter (11 km) is about half the size of the body (19 x 22 x 27 km). Besides demarking a threshold between cratering and catastrophic disruption, this impact reveals a great deal about the target's interior. Because Phobos has an unusually low density yet exhibits no direct evidence for volatiles such as water ice, it has been supposed that it sequesters volatiles in the deep interior, or that it is made of some exotic substance, or that it is a loosely-aggregated rubble pile. The network of fracture grooves created by the Stickney impact constrain which, if any, of these models accord with observation.
Document ID
19940030894
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Asphaug, E. (NASA Ames Research Center Moffett Field, CA, United States)
Benz, W. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1994
Publication Information
Publication: Lunar and Planetary Inst., The Twenty-Fifth Lunar and Planetary Science Conference. Part 1: A-G
Subject Category
Lunar And Planetary Exploration
Accession Number
94N35400
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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