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Discovery of Grooves on Gaspra

Veverka, J.(1) and Thomas, P.(1) and Simonelli, D.(1) and Belton, M.J.S.(2) and Carr, M.(3) and Chapman, C.(4) and Davies, M.E.(5) and Greeley, R.(6) and Greenberg, R.(7) and Head, J.(8) and Klaasen, K.(9) and Johnson, T.V.(9) and Morrison, D.(10) and Neukum, G. (1994) Discovery of Grooves on Gaspra. Icarus, 1, pp. 72-83. Academic Press, San Diego, USA.

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Abstract

We report the discovery of grooves in Galileo high-resolution images of Gaspra. These features, previously seen only on Mars' satellite Phobos, are most likely related to severe impacts. Grooves on Gaspra occur as linear and pitted depressions, typically 100-200 m wide, 0.8 to 2.5 km long, and 10-20 m deep. Most occur in two major groups, one of which trends approximately parallel to the asteroid's long axis, but is offset by some 15 deg.; the other is approximately perpendicular to this trends. The first of extensive flat facets identified by Thomas et al., Icarus 107. The occurence of grooves on Gaspra is inconsistent with other indications (irregular shape, cratering record) that this asteroid has evolved through a violent collisional history. The bodywide congruence of major groove directions and other structural elements suggests that the present- day Gaspra is a globally coherent body.

Document Type:Article
Additional Information: LIDO-Berichtsjahr=1994,
Title:Discovery of Grooves on Gaspra
Authors:
AuthorsInstitution or Email of Authors
Veverka, J.(1)UNSPECIFIED
Thomas, P.(1)UNSPECIFIED
Simonelli, D.(1)UNSPECIFIED
Belton, M.J.S.(2)UNSPECIFIED
Carr, M.(3)UNSPECIFIED
Chapman, C.(4)UNSPECIFIED
Davies, M.E.(5)UNSPECIFIED
Greeley, R.(6)UNSPECIFIED
Greenberg, R.(7)UNSPECIFIED
Head, J.(8)UNSPECIFIED
Klaasen, K.(9)UNSPECIFIED
Johnson, T.V.(9)UNSPECIFIED
Morrison, D.(10)UNSPECIFIED
Neukum, G.UNSPECIFIED
Date:1994
Journal or Publication Title:Icarus
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:1
Page Range:pp. 72-83
Publisher:Academic Press, San Diego, USA
Series Name:107
Status:Published
HGF - Research field:UNSPECIFIED
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:no assignment
DLR - Research theme (Project):UNSPECIFIED
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Institut für Planetenerkundung
Deposited By: elib DLR-Beauftragter
Deposited On:02 Apr 2006
Last Modified:27 Apr 2009 09:46

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