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[en] It is shown that mutual collisions of particles of the Saturn's rings result in covering the particles by a few-millimeter friable ice dust layer which protects teh ice from further destruction. Analytical dependencies of the restitution coefficient on the collision velocities are derived for a simple impact model in the cases of smooth particles and particles covered by a friable layer of various thickness
Journal
Pis'ma v Astronomicheskij Zhurnal; ISSN 0320-0108; 
; v. 11(1); p. 66-71
; v. 11(1); p. 66-71
[en] Recent discoveries about Saturne planet are recapitulated: the rings and the four new satellites
[fr]
On recapitule les decouvertes recentes autour de Saturne: les anneaux et quatre nouveaux satellitesJournal
Recherche (Paris); ISSN 0029-5671; ; v. 11(114); p. 998-1000
; v. 11(114); p. 998-1000
[en] In the attempt to try to explain the existence of the hydrogen ring atmosphere as due to the erosion of icy surfaces induced by the inpact of the ions of the Saturn magnetosphere in the vicinity of the E ring and of the moons Dione and Tethys, as is suggested by the considerable decrease in the ion phase space densities between 4.5 and 8 Saturn radii, a strong constraint on the lifetimes of the grains which belong to the E ring or on their nature has been found. (Auth.)
Source
Fricke, W. (Astronomisches Rechen-Institut, Heidelberg, Germany, F.R.); Teleki, G. (Astronomical Observatory, Belgrade, Yugoslavia) (eds.); Astrophysics and Space Science Library Proceedings; v. 96; 551 p; ISBN 90-277-1429-0; ; 1982; p. 251-252; D. Reidel; Dordrecht (Netherlands); 6. European regional meeting in astronomy; Dubrovnik (Yugoslavia); 19 - 23 Oct 1981
; 1982; p. 251-252; D. Reidel; Dordrecht (Netherlands); 6. European regional meeting in astronomy; Dubrovnik (Yugoslavia); 19 - 23 Oct 1981
[en] Recent data obtained by Voyager 1 and 2 on the satellites of Jupiter and Saturn planets are briefly reviewed
[fr]
On passe rapidement en revue les dernieres donnees obtenues par Voyager 1 et Voyager 2 sur les satellites de Jupiter et SaturneJournal
Recherche (Paris); ISSN 0029-5671; ; v. 12(120); p. 290-303
; v. 12(120); p. 290-303
[en] A catalogue of more than 51000 observations of the first eight satellites of Saturn has been compiled, and we give a description of this catalogue. Most of the published observations made since 1966, the majority of which are photographic, have been included together with some unpublished series of observations. These have been supplemented by a selection of older data, mostly visual observations, increasing the time-span of the data to 115 years. The observations have been obtained from both published and unpublished sources and tabulated in a consistent format, all times having been reduced to the one time-scale (UTC). Bad quality measurements have been identified and obvious blunders have been corrected. Residuals are given with the observations to show the quality of the data, and as an aid in weighting the different datasets in any subsequent analysis, such as will be required for the precise orbit determinations needed for future space probes like Cassini
Journal
[en] New results emerging from observations of Saturn in 1979-1980, when the rings were seen edge on, are reported. These include details of the outer (E ring) to Saturn and the orbit to Janus. Observations were made with a fully coronographic system adapted to the Meudon 100 cms and Pic-du-Midi 107 cms telescopes in France. (author)
Journal
Philosophical Transactions of the Royal Society of London. Series A: Mathematical and Physical Sciences; ISSN 0080-4614; ; v. 303(1477); p. 281-283
; v. 303(1477); p. 281-283
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