Physics
Scientific paper
Aug 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007noao.prop..337b&link_type=abstract
NOAO Proposal ID #2007B-0337
Physics
Scientific paper
Over 20 years ago, Voyager 2 visited Uranus and obtained high- resolution images of the planet and its satellites. However, the spacecraft was only briefly able to partially image the satellite surfaces and observe Uranus while in its deep winter season. Now, for the first time since the advent of modern telescopic instrumentation, Uranus is observable during its spring equinox, a time of dramatic atmospheric change, and unique viewing geometries. In Aug. 12-14 of 2007 in particular, rare observing opportunities for the Uranian system will occur, as Earth-based observatories will be able to view the ring plane nearly edge-on for the first time since 1965. At this time, multiple satellite mutual events and a rare stellar occultation will take place. We propose to use Gemini-S and SOAR to observe these brief and incredibly rare events at optical and near-IR wavelengths, to measure the seasonal changes in the atmospheric profile of Uranus via the occultation observations, and to search for hemispherical asymmetries among the satellites via photometry and spectroscopy during and surrounding the predicted mutual event times.
Arlot Jean-Eudes
Bauer James M.
Buratti Bonnie Jean
Fitzsimmons Alan
Hammel Heidi Beth
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