The surface and interior of PHOBOS

Details The surface and interior of PHOBOS The surface and interior of PHOBOS

Mar 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994lpi....25...43a&link_type=abstract

In Lunar and Planetary Inst., The Twenty-Fifth Lunar and Planetary Science Conference. Part 1: A-G p 43-44 (SEE N94-35395 11-91)

Astronomy and Astrophysics

Astrophysics

2

Astronomical Models, Cratering, Craters, Fractures (Materials), Impact Damage, Phobos, Terminal Ballistics, Ellipsoids, Fracturing, Grooves, Hypervelocity Impact, Mathematical Models

Scientific paper

The 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.

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