| Abstract: | The first images of the asteroid 243 Ida from Galileo show an irregular object measuring 56 kilometers by 24 kilometers by 21 kilometers. Its surface is rich in geologic features, including systems of grooves, blocks, chutes, albedo features, crater chains, and a full range of crater morphologies. The largest blocks may be distributed nonuniformly across the surface; lineaments and dark-floored craters also have preferential locations. Ida is interpreted to have a substantial regolith. The high crater density and size-frequency distribution (-3 differential power-law index) indicate a surface in equilibrium with saturated cratering. A minimum model crater age for Ida - and therefore for the Koronis family to which Ida belongs - is estimated at 1 billion years, older than expected. |
| Genre: | Article |
| ProdID: | 70017535 |
| Citation Author: | Belton, M. J. S.; Chapman, C. R.; Veverka, J.; Klaasen, K. P.; Harch, A.; Greeley, R.; Greenberg, R.; Head, III, J. W.; McEwen, A.; Morrison, D.; Thomas, P. C.; Davies, M. E.; Carr, M. H.; Neukum, G.; Fanale, F. P.; Davis, D. R.; Anger, C.; Gierasch, P. J.; Ingersoll, A. P.; Pilcher, C. B. |
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| Citation End Page: | 1547 |
| Citation Issue: | 5178 |
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| Citation Language: | English |
| Citation Larger Work Title: | Science |
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| Citation Number Of Pages: | 5 |
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| Citation Search Results Text: | First images of asteroid 243 Ida; 1994; Article; Journal; Science; Belton, M. J. S.; Chapman, C. R.; Veverka, J.; Klaasen, K. P.; Harch, A.; Greeley, R.; Greenberg, R.; Head, III, J. W.; McEwen, A.; Morrison, D.; Thomas, P. C.; Davies, M. E.; Carr, M. H.; Neukum, G.; Fanale, F. P.; Davis, D. R.; Anger, C.; Gierasch, P. J.; Ingersoll, A. P.; Pilcher, C. B. |
| Citation Start Page: | 1543 |
| Citation Volume: | 265 |
| Citation Year: | 1994 |
| Type: | citation/reference |
| Text: | First images of asteroid 243 Ida; 1994; Article; Journal; Science; Belton, M. J. S.; Chapman, C. R.; Veverka, J.; Klaasen, K. P.; Harch, A.; Greeley, R.; Greenberg, R.; Head, III, J. W.; McEwen, A.; Morrison, D.; Thomas, P. C.; Davies, M. E.; Carr, M. H.; Neukum, G.; Fanale, F. P.; Davis, D. R.; Anger, C.; Gierasch, P. J.; Ingersoll, A. P.; Pilcher, C. B. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
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