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Ultraviolet Observations of Uranus and Neptune Below 3000 AngstromFrom 2000 to 3000 A, both Uranus and Neptune have albedos that are about two times higher than Jupiter or Saturn's, implying that the outer giants have stratospheres that are relatively free of aerosol absorption. Uncertainties in the absolute calibration procedure allow discrepancies of order 15% between conservative models and the observations. A small amount of aerosol absorption is therefore possible. Below 2000 A the derived albedo is highly dependent on the solar spectrum source used in the data reduction. The most recent result for Uranus, first reported here, is consistent with a secular change in C2H2 mixing ratio from approximately three times ten to the minus eight in 1980 to less than or equal to ten to the minus ninth in 1983. These values are approximately 2 orders of magnitude less than the mixing ratios of this gas on Saturn, and comparable to the amount on Jupiter.
Document ID
19850003624
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Caldwell, J.
(State Univ. of New York Stony Brook, NY, United States)
Wagener, R.
(State Univ. of New York Stony Brook, NY, United States)
Owen, T.
(State Univ. of New York Stony Brook, NY, United States)
Combes, M.
(Observatoire de Paris)
Encrenaz, T.
(Observatoire de Paris)
Date Acquired
August 12, 2013
Publication Date
October 1, 1984
Publication Information
Publication: JPL Uranus and Neptune
Subject Category
Lunar And Planetary Exploration
Accession Number
85N11932
Funding Number(s)
CONTRACT_GRANT: NSG-5250
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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