| タイトル | Amalthea's density is less than that of water |
| 著者（英） | Anderson, John D.; Thomas, Peter C.; Weinwurm, Gudrun; Asmar, Sami; Jacobson, Robert A.; Moore, William B.; Schubert, Gerald; Lau, Eunice L.; Lewis, George; Johnston, Douglas; Taylor, Anthony; Johnson, Torrence V. |
| 発行日 | 2005-05-27 |
| 言語 | eng |
| 内容記述 | Radio Doppler data from the Galileo spacecraft's encounter with Amalthea, one of Jupiter's small inner moons, on 5 November 2002 yield a mass of (2.08 +/- 0.15) x 10(18) kilograms. Images of Amalthea from two Voyager spacecraft in 1979 and Galileo imaging between November 1996 and June 1997 yield a volume of (2.43 +/- 0.22) x 10(6) cubic kilometers. The satellite thus has a density of 857 +/- 99 kilograms per cubic meter. We suggest that Amalthea is porous and composed of water ice, as well as rocky material, and thus formed in a cold region of the solar system, possibly not at its present location near Jupiter. |
| NASA分類 | Lunar and Planetary Science and Exploration |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/294653 |
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