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Detection of the SO2 Atmosphere on Io with the Hubble Space Telescope
Feldman, P. D.; Moos, H. W.; Ballester, G. E. +3 more
Observations of the trailing hemisphere of Io made with the Faint Object Spectrograph of the Hubble Space Telescope in March 1992 have resulted in the first detection of atmospheric SO2 absorption bands in the ultraviolet. These observations represent only the third positive means of detection of what is widely believed to be Io's prima…
Monitoring Mars with the Hubble Space Telescope: 1990-1991 Observations
Clancy, R. Todd; James, Philip B.; Lee, Steven W. +5 more
Images of Mars obtained using the Planetary Camera on the Hubble Space Telescope during 1990 and 1991 are described and analyzed. Multispectral images of Mars record the martian season between Ls = 348° and 60° corresponding to late winter and spring in the northern hemisphere. The wavelengths of these observations varied between 230 nm…
Disk-Resolved Imaging of Io with the Hubble Space Telescope
McGrath, Melissa A.; Paresce, Francesco; Sartoretti, Paola
The first disk-resolved image of Io's trailing hemisphere in the ultraviolet, as well as a visible image of the same hemisphere, has been obtained with the Faint Object Camera (FOC) of the Hubble Space Telescope on March 15, 1992, at a resolution of 210 km. Io shows no large-scale changes in the visible over the 13 years elapsed since the last dis…
Dynamical and Observational Constraints on Satellites in the Inner Pluto-Charon System
Stern, S. Alan; Levison, Harold F.; Duncan, Martin J. +2 more
It is not known if Pluto has other satellites besides its massive partner Charon. In the past, searches for additional satellites in the Pluto-Charon system have extended from the Solar-tidal stability boundary (≈90 arcsec from Pluto) inward to about 1 arcsec from Pluto. Here we further explore the inner (i.e., <10 arcsec) region of the Pluto-C…
A Hubble Space Telescope Study of Posteclipse Brightening and Albedo Changes on Io
Secosky, James J.; Potter, Michael
Images of Io taken by the Hubble Space Telescope Planetary Camera using filters at 7120 and 3577 Å in April and May 1992 shortly after Io emerged from Jupiter's shadow have been analyzed for the effect of posteclipse brightening first reported by Binder and Cruikshank (1964, Icarus 3,299-305). The classic effect displays a 10% increase in brighten…
The Ultraviolet Spectrum of Triton from HST: First Results
Stern, S. Alan; Trafton, Laurence M.
We report on the first Hubble Space Telescope (HST) spectra of Neptune's largest satellite, Triton. The spectra were taken on 16-17 May 1992 by the HST Faint Object Spectrograph. They span the region 2220-3278 Å. This overlaps IUE spectra of Triton we obtained, 2700-3100 Å, and penetrates the region from 2220 to 2550 A for the first time. The deri…