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Jovian satellite positions from Hubble Space Telescope images
Mallama, Anthony; Aelion, Halley M.; Mallama, Celeste A.
An accurate technique has been developed for measuring planetocentric positions of Jupiter's satellites from Wide Field/Planetary Camera images. Our method of finding the centers of the satellites and planet is based upon established limb-fitting techniques, but we have adapted those techniques to astrometry. We compare our limb-fitting results wi…
Mafic silicate mapping on Mars: effects of palagonitic material, multiple mafic silicates, and spectral resolution
Bell, James F.; Cloutis, Edward A.
The visible to near-infrared spectral reflectance properties of intimate and areal pyroxene + palagonitic material mixtures as well as pure mafic silicates (low-calcium pyroxene, high-calcium pyroxene, pigeonite, olivine) and mixtures of these minerals were analyzed at high spectral resolution (5 nm) as well as with non-contiguous band passes equi…
The Cassini-Huygens flyby of Jupiter
Lebreton, Jean-Pierre; Matson, Dennis L.; Spilker, Linda J. +2 more
The Cassini-Huygens spacecraft flew by Jupiter on December 30, 2000. The instruments aboard the spacecraft started making scientific observations three months earlier. Joint, collaborative observations were carried out with the teams of other spacecraft, notably Galileo, and with Earth-based observers. An operational overview of the flyby is prese…