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The Subaru Seminar is
usually held in Room 104 of the Hilo Base Facility, adjacent
to the main lobby. Everyone is welcome to attend. If you are
interested in giving a seminar, please contact Subaru seminar organizers
(Tomonori Usuda, Kumiko S. Usuda, Naoyuki Tamura)
by email : sseminar_at_subaru.naoj.org (please change"_at" to @).
March 29, Monday, at 10:00 am
" The brightness of Saturn's F ring "
Robert French
(SETI Institute)
Saturn's F ring has brightened markedly in the last 25 years. It is
twice as bright in the Cassini data as it was in the Voyager ata from
1980 and 1981. This conclusion is based on photometric comparisons of
Cassini and Voyager images, and is supported by occultation data. We
attribute this change to increasing perturbations by nearby
Prometheus, which passes closer to the ring now that it did in the
Voyager era, yielding more dust.