Galileo encounter with 951 Gaspra: First pictures of an asteroid

M. J.S. Belton; J. Veverka; P. Thomas; P. Helfenstein; D. Simonelli; C. Chapman; M. E. Davies; R. Greeley; R. Greenberg; J. Head; S. Murchie; K. Klaasen; T. V. Johnson; A. McEwen; D. Morrison; G. Neukum; F. Fanale; C. Anger; M. Carr; C. Pilcher

doi:10.1126/science.257.5077.1647

Galileo encounter with 951 Gaspra: First pictures of an asteroid

M. J.S. Belton, J. Veverka, P. Thomas, P. Helfenstein, D. Simonelli, C. Chapman, M. E. Davies, R. Greeley, R. Greenberg, J. Head, S. Murchie, K. Klaasen, T. V. Johnson, A. McEwen, D. Morrison, G. Neukum, F. Fanale, C. Anger, M. Carr, C. Pilcher

Planetary Sciences

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187 Scopus citations

Abstract

Galileo images of Gaspra reveal it to be an irregularly shaped object (19 by 12 by 11 kilometers) that appears to have been created by a catastrophic collisional disruption of a precursor parent body. The cratering age of the surface is about 200 million years. Subtle albedo and color variations appear to correlate with morphological features: Brighter materials are associated with craters especially along the crests of ridges, have a stronger 1-micrometer absorption, and may represent freshly excavated mafic materials; darker materials exhibiting a significantly weaker 1-micrometer absorption appear concentrated in interridge areas. One explanation of these patterns is that Gaspra is covered with a thin regolith and that some of this material has migrated downslope in some areas.

Original language	English (US)
Pages (from-to)	1647-1652
Number of pages	6
Journal	Science
Volume	257
Issue number	5077
DOIs	https://doi.org/10.1126/science.257.5077.1647
State	Published - 1992

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Belton, M. J. S., Veverka, J., Thomas, P., Helfenstein, P., Simonelli, D., Chapman, C., Davies, M. E., Greeley, R., Greenberg, R., Head, J., Murchie, S., Klaasen, K., Johnson, T. V., McEwen, A., Morrison, D., Neukum, G., Fanale, F., Anger, C., Carr, M., & Pilcher, C. (1992). Galileo encounter with 951 Gaspra: First pictures of an asteroid. Science, 257(5077), 1647-1652. https://doi.org/10.1126/science.257.5077.1647

Belton, MJS, Veverka, J, Thomas, P, Helfenstein, P, Simonelli, D, Chapman, C, Davies, ME, Greeley, R, Greenberg, R, Head, J, Murchie, S, Klaasen, K, Johnson, TV, McEwen, A, Morrison, D, Neukum, G, Fanale, F, Anger, C, Carr, M & Pilcher, C 1992, 'Galileo encounter with 951 Gaspra: First pictures of an asteroid', Science, vol. 257, no. 5077, pp. 1647-1652. https://doi.org/10.1126/science.257.5077.1647

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abstract = "Galileo images of Gaspra reveal it to be an irregularly shaped object (19 by 12 by 11 kilometers) that appears to have been created by a catastrophic collisional disruption of a precursor parent body. The cratering age of the surface is about 200 million years. Subtle albedo and color variations appear to correlate with morphological features: Brighter materials are associated with craters especially along the crests of ridges, have a stronger 1-micrometer absorption, and may represent freshly excavated mafic materials; darker materials exhibiting a significantly weaker 1-micrometer absorption appear concentrated in interridge areas. One explanation of these patterns is that Gaspra is covered with a thin regolith and that some of this material has migrated downslope in some areas.",

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doi = "10.1126/science.257.5077.1647",

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T2 - First pictures of an asteroid

AU - Belton, M. J.S.

AU - Veverka, J.

AU - Thomas, P.

AU - Helfenstein, P.

AU - Simonelli, D.

AU - Chapman, C.

AU - Davies, M. E.

AU - Greeley, R.

AU - Greenberg, R.

AU - Head, J.

AU - Murchie, S.

AU - Klaasen, K.

AU - Johnson, T. V.

AU - McEwen, A.

AU - Morrison, D.

AU - Neukum, G.

AU - Fanale, F.

AU - Anger, C.

AU - Carr, M.

AU - Pilcher, C.

PY - 1992

Y1 - 1992

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AB - Galileo images of Gaspra reveal it to be an irregularly shaped object (19 by 12 by 11 kilometers) that appears to have been created by a catastrophic collisional disruption of a precursor parent body. The cratering age of the surface is about 200 million years. Subtle albedo and color variations appear to correlate with morphological features: Brighter materials are associated with craters especially along the crests of ridges, have a stronger 1-micrometer absorption, and may represent freshly excavated mafic materials; darker materials exhibiting a significantly weaker 1-micrometer absorption appear concentrated in interridge areas. One explanation of these patterns is that Gaspra is covered with a thin regolith and that some of this material has migrated downslope in some areas.

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Galileo encounter with 951 Gaspra: First pictures of an asteroid

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