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Six-color photometry of Iapetus, Titan, Rhea, Dione and TethysSix-color photometric observations made during Saturn's 1972/73 opposition enable us to separate the solar phase and orbital phase contributions to the observed light variations of Iapetus, Titan, Rhea, Dione and Tethys. Titan shows no orbital variations, but has phase coefficients which range from negligible values in the infrared to 0.014 mag/deg in the ultraviolet. Rhea has a bright leading side, a light curve amplitude of about 0.2 mag, and surprisingly large phase coefficients. Combined with other available information, the observations suggest a very porous, texturally complex surface layer. Dione has a leading side which is a few tenths of a magnitude brighter than the trailing side, but the light curve amplitude has little wavelength dependence and the phase coefficients are significantly smaller than those of Rhea, suggesting a less intricate surface texture. The leading side of Tethys is probably a few tenths of a magnitude brighter than the trailing side. Our Iapetus observations generally supplement the earlier work by Millis.
Document ID
19750031581
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Noland, M.
Veverka, J.
(Cornell University Ithaca, N.Y., United States)
Morrison, D.
Cruikshank, D. P.
Lazarewicz, A. R.
Morrison, N. D.
(Hawaii, University Honolulu, Hawaii, United States)
Elliot, J. L.
Goguen, J.
Burns, J. A.
Date Acquired
August 8, 2013
Publication Date
November 1, 1974
Publication Information
Publication: Icarus
Volume: 23
Subject Category
Lunar And Planetary Exploration
Accession Number
75A15653
Funding Number(s)
CONTRACT_GRANT: NGR-33-010-082
CONTRACT_GRANT: NGL-12-001-057
Distribution Limits
Public
Copyright
Other

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