Detection of a Deep 3-µm Absorption Feature in the Spectrum of Amalthea (JV)

@article{Takato2004DetectionOA,
  title={Detection of a Deep 3-µm Absorption Feature in the Spectrum of Amalthea (JV)},
  author={Naruhisa Takato and Schelte J. Bus and Hiroshi Terada and Tae-soo Pyo and Naoto Kobayashi},
  journal={Science},
  year={2004},
  volume={306},
  pages={2224 - 2227}
}
Near-infrared spectra of Jupiter's small inner satellites Amalthea and Thebe are similar to those of D-type asteroids in the 0.8- to 2.5-micrometer wavelength range. A deep absorption feature is detected at 3 micrometers in the spectra of the trailing side of Amalthea, which is similar to that of the non-ice components of Callisto and can be attributed to hydrous minerals. These surface materials cannot be explained if the satellite formed at its present orbit by accreting from a circumjovian… 
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