Uranian Moons and Faint Rings at Ring Plane Crossing

Details Uranian Moons and Faint Rings at Ring Plane Crossing Uranian Moons and Faint Rings at Ring Plane Crossing

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007noao.prop....9s&link_type=abstract

NOAO Proposal ID #2007B-0009

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Scientific paper

We request one full night and two half-nights to observe Uranus during its ring plane crossing. The edge-on main rings will be nearly invisible in August-September, allowing a clear view of Uranus's smallest moons and faintest rings. This proposal is one component of a program to study diverse aspects of the Uranian ring-moon system near equinox: (a) Where are the ``shepherd'' moons believed to confine Uranus's narrow rings? (b) What is the thickness and packing density of ring (epsilon)? Can it explain the ring's large eccentricity? (c) What is the nature of the dust rings scattered throughout the system, some only seen in Voyager data? (d) What is the time scale of the chaotic interactions recently identified among Uranus's inner moons? (e) What perturbs Mab, whose orbit is more irregular than that of any other known moon? (f) Why is Mab's dust ring blue whereas other rings are red? It will be 42 years before we have another opportunity to address most of these questions using Earth-based data.

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