| Abstract: | DURING its reconnaissance of the asteroid 243 Ida, the Galileo spacecraft returned images of a second object, 1993(243)1 Dactyl1 - the first confirmed satellite of an asteroid. Sufficient data were obtained on the motion of Dactyl to determine its orbit as a function of Ida‘s mass. Here we apply statistical and dynamical arguments to constrain the range of possible orbits, and hence the mass of Ida. Combined with the volume of Ida2, this yields a bulk density of 2.6 ?? 0.5 g cm-3. Allowing for the uncertainty in the porosity of Ida, this density range is consistent with a bulk chon-dritic composition, and argues against some (but not all) classes of meteoritic igneous rock types that have been suggested as compositionally representative of S-type asteroids like Ida. ?? 2002 Nature Publishing Group. |
| Genre: | Article |
| ProdID: | 70018743 |
| Citation Author: | Belton, M. J. S.; Chapman, C. R.; Thomas, P. C.; Davies, M. E.; Greenberg, R.; Klaasen, K.; Byrnes, D.; D'Amario, L.; Synnott, S.; Johnson, T. V.; McEwen, A.; Merline, W. J.; Davis, D. R.; Petit, J. -M.; Storrs, A.; Veverka, J.; Zellner, B. |
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| Citation End Page: | 788 |
| Citation Issue: | 6525 |
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| Citation Language: | English |
| Citation Larger Work Title: | Nature |
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| Citation Number Of Pages: | 4 |
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| Citation Search Results Text: | Bulk density of asteroid 243 Ida from the orbit of its satellite Dactyl; 1995; Article; Journal; Nature; Belton, M. J. S.; Chapman, C. R.; Thomas, P. C.; Davies, M. E.; Greenberg, R.; Klaasen, K.; Byrnes, D.; D‘Amario, L.; Synnott, S.; Johnson, T. V.; McEwen, A.; Merline, W. J.; Davis, D. R.; Petit, J. -M.; Storrs, A.; Veverka, J.; Zellner, B. |
| Citation Start Page: | 785 |
| Citation Volume: | 374 |
| Citation Year: | 1995 |
| Type: | citation/reference |
| Text: | Bulk density of asteroid 243 Ida from the orbit of its satellite Dactyl; 1995; Article; Journal; Nature; Belton, M. J. S.; Chapman, C. R.; Thomas, P. C.; Davies, M. E.; Greenberg, R.; Klaasen, K.; Byrnes, D.; D‘Amario, L.; Synnott, S.; Johnson, T. V.; McEwen, A.; Merline, W. J.; Davis, D. R.; Petit, J. -M.; Storrs, A.; Veverka, J.; Zellner, B. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sun, 1 Jan 1995 00:00 -0600 |
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