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The mesosphere and lower thermosphere of Titan revealed by Cassini/UVIS stellar occultations
Sandel, B. R.; West, R. A.; Yelle, R. V. +5 more
Stellar occultations observed by the Cassini/UVIS instrument provide unique data that probe the mesosphere and lower thermosphere of Titan at altitudes between 400 and 1400 km. This region is a site of complex photochemistry that forms hydrocarbon and nitrile species, and plays a crucial role in the formation of the organic hazes observed in the s…
Ultraviolet spectroscopy of Asteroid (4) Vesta
A'Hearn, Michael F.; Feaga, Lori M.; Russell, Christopher T. +6 more
We report a comprehensive review of the UV-visible spectrum and rotational lightcurve of Vesta combining new observations by Hubble Space Telescope and Swift Gamma-ray Burst Observatory with archival International Ultraviolet Explorer observations. The geometric albedos of Vesta from 220 nm to 953 nm are derived by carefully comparing these observ…