Observations with the Visual and Infrared Mapping Spectrometer (VIMS) during Cassini's flyby of Jupiter

R. H. Brown, K. H. Baines, G. Bellucci, J. P. Bibring, B. J. Buratti, F. Capaccioni, P. Cerroni, R. N. Clark, A. Coradini, D. P. Cruikshank, P. Drossart, V. Formisano, R. Jaumann, Y. Langevin, D. L. Matson, T. B. McCord, V. Mennella, R. M. Nelson, P. D. Nicholson, B. SicardyC. Sotin, S. Amici, M. A. Chamberlain, G. Filacchione, G. Hansen, K. Hibbitts, M. Showalter

Research output: Contribution to journalArticle

48 Scopus citations

Abstract

The Cassini Visual and Infrared Mapping Spectrometer (VIMS) is an imaging spectrometer covering the wavelength range 0.3-5.2 μm in 352 spectral channels, with a nominal instantaneous field of view of 0.5 mrad. The Cassini flyby of Jupiter represented a unique opportunity to accomplish two important goals: scientific observations of the jovian system and functional tests of the VIMS instrument under conditions similar to those expected to obtain during Cassini's 4-year tour of the saturnian system. Results acquired over a complete range of visual to near-infrared wavelengths from 0.3 to 5.2 μm are presented. First detections include methane fluorescence on Jupiter, a surprisingly high opposition surge on Europa, the first visual-near-IR spectra of Himalia and Jupiter's optically-thin ring system, and the first near-infrared observations of the rings over an extensive range of phase angles (0-120°). Similarities in the center-to-limb profiles of H3 + and CH4 emissions indicate that the H3 + ionospheric density is solar-controlled outside of the auroral regions. The existence of jovian NH3 absorption at 0.93 μm is confirmed. Himalia has a slightly reddish spectrum, an apparent absorption near 3 μm, and a geometric albedo of 0.06 ± 0.01 at 2.2 μm (assuming an 85-km radius). If the 3-μm feature in Himalia's spectrum is eventually confirmed, it would be suggestive of the presence of water in some form, either free, bound, or incorporated in layer-lattice silicates. Finally, a mean ring-particle radius of 10 μm is found to be consistent with Mie-scattering models fit to VIMS near-infrared observations acquired over 0-120° phase angle.

Original languageEnglish (US)
Pages (from-to)461-470
Number of pages10
JournalIcarus
Volume164
Issue number2
DOIs
StatePublished - Aug 1 2003

Keywords

  • Cassini mission
  • Jovian satellites
  • Jupiter
  • Jupiter's ring
  • Planetary atmospheres
  • Planetary surfaces
  • Spectroscopy

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint Dive into the research topics of 'Observations with the Visual and Infrared Mapping Spectrometer (VIMS) during Cassini's flyby of Jupiter'. Together they form a unique fingerprint.

  • Cite this

    Brown, R. H., Baines, K. H., Bellucci, G., Bibring, J. P., Buratti, B. J., Capaccioni, F., Cerroni, P., Clark, R. N., Coradini, A., Cruikshank, D. P., Drossart, P., Formisano, V., Jaumann, R., Langevin, Y., Matson, D. L., McCord, T. B., Mennella, V., Nelson, R. M., Nicholson, P. D., ... Showalter, M. (2003). Observations with the Visual and Infrared Mapping Spectrometer (VIMS) during Cassini's flyby of Jupiter. Icarus, 164(2), 461-470. https://doi.org/10.1016/S0019-1035(03)00134-9