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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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.
|Title:||Discovery of Grooves on Gaspra|
|Journal or Publication Title:||Icarus|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 72-83|
|Publisher:||Academic Press, San Diego, USA|
|HGF - Research field:||UNSPECIFIED|
|HGF - Program:||no assignment|
|HGF - Program Themes:||no assignment|
|DLR - Research area:||UNSPECIFIED|
|DLR - Program:||no assignment|
|DLR - Research theme (Project):||UNSPECIFIED|
|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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