8761(  1) - 12/30/99 13:05  - [  1]

    PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS   ST ScI Use Only
                                                       ID:      8761
                                                       Version: 1
                                                       Check-in Date: 30-Dec-1999
                                                                      12:32:46

1.Proposal Title:
Inclined Features in Saturn's Rings
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2. Proposal For  3. Cycle
AR               9
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4. Investigators
                                                                                     Contact?
    PI: Amanda Bosh                       Lowell Observatory
   CoI: Dr. Catherine Olkin               Lowell Observatory                            N

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5. Abstract

The occultation of GSC529-01240 observed in 1995 with the FOS on HST (GO-5824, Bosh
PI) was the most sensitive occultation to date for inclinations in Saturn's rings.
The F ring has been determined to be inclined using these data, and this has been
independently verified with WFPC2 imaging of the F ring entering eclipse (possible
only for an inclined F ring). Additional ring features in this data set exhibit
signs of possible inclination (high radial residuals in just the 1995 data set). We
propose to investigate these ring features for inclinations using the same method as
was applied to the F ring. The improved kinematic models that will result from these
analyses will lead to better understanding of narrow ringlet confinement. The
determination of Saturn's gravitational harmonics and thus its interior structure
will also be improved due to better ringlet models, as several ringlets are now used
as significant constraints to these parameters.
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                                                8761(  1) - 12/30/99 13:05  - [  2]

            Summary Form for Proposal  8761

  Item                         Used in this proposal
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  Proposal Category            AR
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