Ring structure in Saturn's outer magnetosphere

Abstract

The presence of a particulate or gaseous ring in Saturn's outer magnetosphere at distances of 14 and 19 radii from Saturn was predicted by Lazarus et al.¹ based on the analysis of ion density measurements by Voyagers 1 and 2 and Pioneer 11. The ring structure at 14 radii from Saturn was detected by Vasundhara et al.² from the occultation observations of the star SAO158913 on 24 and 25 March 1984. We report here the detection of a ring system at 19 radii using photoelectric observations of the occultation of the star SAO158763 on 12 May 1984.