Results for Titan's atmosphere from its occultation of 28 Sagittarii

William B. Hubbard, D. M. Hunten, H. J. Reitsema, N. Brosch, Y. Nevo, E. Carreira, F. Rossi, L. H. Wasserman

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ON 3 July 1989 the bright K giant star 28 Sgr was occulted by Saturn's largest moon, Titan. This event, which was predicted by Wasserman1, offered a unique opportunity to probe Titan's extensive nitrogen-rich atmosphere in an altitude range not investigated by the Voyager 1 spacecraft2,3. Our group observed the occultation from three stations in the Mediterranean area, and here we examine the data set. We derive average mesospheric temperatures of ∼180 K, with evidence for lateral and vertical atmospheric inhomogeneities on scales ranging from ∼10-1,000 km. Our results are consistent with published models4of Titan's mesosphere.

Original languageEnglish (US)
Pages (from-to)353-355
Number of pages3
Issue number6256
Publication statusPublished - 1990


ASJC Scopus subject areas

  • General

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Hubbard, W. B., Hunten, D. M., Reitsema, H. J., Brosch, N., Nevo, Y., Carreira, E., ... Wasserman, L. H. (1990). Results for Titan's atmosphere from its occultation of 28 Sagittarii. Nature, 343(6256), 353-355.