The 1 May 1982 stellar occultation by Uranus and the rings: Observations from Mount Stromlo Observatory

Richard G. French, Terry J. Jones, A. R. Hyland

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Abstract

The 1 May 1982 occultation of KME 15 by Uranus and its rings was observed at λ = 2.2 μm using the 1.9-m telescope of the Mount Stromlo Observatory. From model fits to the immersion and emersion ring profiles, accurate midtimes for rings 6, 5, 4, α, β, η, γ, σ, and ε{lunate}, and ring widths, equivalent widths, and normal optical depths for all but ring 6 were obtained. The recently discovered ring 1986 U1R is not detectable in the data, setting an upper limit on the product of ring width and normal optical depth of ≤0.4 km at λ = 2.2 μm. From the immersion and emersion atmosphere occultations, vertical temperature profiles were obtained by numerical inversion. Both profiles show mean temperatures near 130°K and a local maximum near the 8-μbar pressure level.

Original languageEnglish (US)
Pages (from-to)499-505
Number of pages7
JournalIcarus
Volume69
Issue number3
DOIs
StatePublished - Mar 1987

Bibliographical note

Funding Information:
We thank Philip Nicholson,J ohn Hillier, and the staff of Mt. StromloO bservatorfyo r assistancwe ith the observationTs.h is researchw as supporteidn part by NASA Grant NSG-7526 and NSF Grant AST-829825.

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