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Anomalous scattering of light on TritonResearchers report here the discovery of an isolated region of anomalously forward scattering materials on the surface of Triton. The researchers' best-fit Hapke parameters indicate that regolith particles in the anomalous scattering region are not only less backward scattering, but also slightly lower in single scattering albedo than average materials on Triton's surface. While it might be possible to account for such differences in terms of differences in particle size and transparency, it is also possible that the anomalous region is compositionally distinct from other terrains. It is noteworthy that, for the anomalous region, there exists a distinctively strong spatial correlation between the photometric ratios at different phase angles, and that, relative to other terrains, the anomalous region reddens at a different rate with increasing phase angle.
Document ID
19920001618
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Helfenstein, Paul (Cornell Univ. Ithaca, NY, United States)
Lee, Pascal (Cornell Univ. Ithaca, NY, United States)
Mccarthy, Derek (Cornell Univ. Ithaca, NY, United States)
Veverka, Joseph (Cornell Univ. Ithaca, NY, United States)
Date Acquired
September 6, 2013
Publication Date
June 1, 1991
Publication Information
Publication: NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1990
Subject Category
Lunar And Planetary Exploration
Accession Number
92N10836
Funding Number(s)
CONTRACT_GRANT: NAGW-2084
CONTRACT_GRANT: NSG-7156
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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