10319(  1) - 04/02/04 11:52  - [  1]

    PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS   ST ScI Use Only
                                                       ID:      10319
                                                       Version: 1
                                                       Check-in Date: 02-Apr-2004
                                                                      11:52:04

1.Proposal Title:
An Analysis of HST and IUE Spectra to Investigate the Effects of Space Weathering at
Ultraviolet Wavelengths
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2. Proposal For  3. Cycle  4. Parallel Pointing Tolerance
AR               13        <none>
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5. Investigators
                                                                                     Contact?
    PI: Dr. Amanda R. Hendrix             Jet Propulsion Laboratory
   CoI: Dr. Faith Vilas                   NASA Johnson Space Center                     N
   CoI: Ms. Kandy S. Jarvis               Lockheed Martin Space Operations              N

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6. Abstract

This archival proposal is part of a program to obtain new and analyze existing
ultraviolet spectra of asteroids, in order to look for characteristics of space
weathering in a wavelength range that has been shown to be extremely sensitive to
weathering processes. We discuss recent results from the Moon, lunar samples and
Vesta that show that the ultraviolet-visible wavelength region may exhibit a
relatively blue spectral shape, and in some cases may exhibit a spectral reversal in
response to space weathering. Analysis of asteroid spectra at ultraviolet
wavelengths is key to furthering our understanding of space weathering and solar
system surfaces. Here we propose to analyze the HST and IUE spectra of asteroids
that exist in the MAST archive, to look for and better understand the effects of
space weathering at UV wavelengths.
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                                                10319(  1) - 04/02/04 11:52  - [  2]

            Summary Form for Proposal  10319

  Item                         Used in this proposal
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  Proposal Category            AR
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