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The Cassini Campaign observations of the Jupiter aurora by the Ultraviolet Imaging Spectrograph and the Space Telescope Imaging Spectrograph
Stewart, Ian; Gérard, J. -C.; Gustin, Jacques +6 more
We have analyzed the Cassini Ultraviolet Imaging Spectrometer (UVIS) observations of the Jupiter aurora with an auroral atmosphere two-stream electron transport code. The observations of Jupiter by UVIS took place during the Cassini Campaign. The Cassini Campaign included support spectral and imaging observations by the Hubble Space Telescope (HST…
The icy Galilean satellites: ultraviolet phase curve analysis
Domingue, Deborah L.; Hendrix, Amanda R.; King, Kimberly
Ultraviolet disk-integrated solar phase curves of the icy galilean satellites Europa, Ganymede, and Callisto are presented, using combined data sets from the International Ultraviolet Explorer (IUE), Hubble Space Telescope (HST), and the Galileo Ultraviolet Spectrometer. Global, disk-integrated solar phase curves for all three satellites, in addit…
Prometheus and Pandora: masses and orbital positions during the Cassini tour
French, Richard G.; Sicardy, Bruno; Renner, Stéfan
Hubble Space Telescope ( HST) images of Prometheus and Pandora show longitude discrepancies of about 20° with respect to the Voyager ephemerides, with an abrupt change in mean motion at the end of 2000 (French et al., 2003, Icarus 162, 143-170; French and McGhee, 2003, Bull. Am. Astron. Soc. 34, 06.07). These discrepancies are anti-correlated and …
S/2004 S 5: A new co-orbital companion for Dione
Cooper, N. J.; Murray, C. D.; Evans, M. W. +1 more
We describe the astrometry and dynamics of S/2004 S 5 (provisionally named Polydeuces), a new satellite of Saturn, discovered in images recorded using the Imaging Science Subsystem (ISS) of the Cassini spacecraft. A total of 119 observations are presented, 101 of which were obtained with Cassini's narrow-angle camera and 18 using the wide-angle ca…
Hubble Space Telescope observations of the nucleus fragment 73P/Schwassmann Wachmann 3-C
Lamy, P.; Toth, I.; Weaver, H. A.
The investigation of fragmented comets provides information on the physical properties and internal structure of cometary nuclei, as well as insights into the mechanisms responsible for cometary breakups. The Jupiter-family Comet 73P/Schwassmann-Wachmann 3 (73P/SW3) fragmented non-tidally into at least four components, and probably more, in the au…
Near-IR imaging of Asteroid 4 Vesta
de Pater, I.; Gibbard, S.; Marchis, F. +2 more
The Keck Observatory's adaptive optics (AO) system has been used to observe Asteroid 4 Vesta during its 2003 closest approach to Earth. Broadband K- and L-band images, centered at 2.1 and 3.6 µm, respectively, are presented here. The sharpness of the images was improved by applying a deconvolution algorithm, MISTRAL, to the images. The K- an…
Hubble Space Telescope imaging polarimetry of Mars during the 2003 opposition
Kreslavsky, M.; Shkuratov, Yu.; Kaydash, V. +6 more
We report results of polarimetric imaging observations of Mars with the Hubble Space Telescope during the 2003 opposition. Through careful calibration, the observations with the ACS camera allow measurements of the polarization degree with an absolute accuracy better than 0.5% and detection of features with polarization degree contrast as small as…
A closer look at main belt asteroids 1: WF/PC images
Weiss, B. P.; Storrs, A. D.; Zellner, B. +3 more
We present new reconstructions of images of main belt Asteroids 9 Metis, 18 Melpomene, 19 Fortuna, 216 Kleopatra, and 624 Hektor, made with the uncorrected Wide-Field/Planetary Camera (WF/PC) on the Hubble Space Telescope (HST). Deconvolution with the MISTRAL algorithm demonstrates that these asteroids are clearly resolved. We determine diameters,…
Visible albedo of Mars' south polar cap: 2003 HST observations
Wolff, Michael J.; James, Philip B.; Bonev, Boncho P.
The martian south polar cap was observed with the High Resolution Camera on Hubble Space Telescope near the very favorable 2003 opposition. Well calibrated images taken at a number of wavelengths in visible and UV were used to measure the apparent Lambert albedos of two bright polar areas. These were corrected for the effects of atmospheric dust t…
Thermal response of Iapetus to an eclipse by Saturn's rings
Nicholson, P. D.; Matthews, K.; Soifer, B. T. +3 more
Measurements of Iapetus as seen at 20 and 2.2 µm in the shadow of Saturn's ring are given, providing the thermal response to a rapidly varying heat input. The 20 µm thermal emission follows the 2.2 µm flux input closely. The observations, plus a simple diffusion calculation, imply that the surface of Iapetus is made of material h…