Detection of arcs in Saturn ’ s F ring during the 1995 Sun ring - plane crossing
نویسنده
چکیده
Observations of the November 1995 Sun crossing of the Saturn’s ring-plane made with the 3.6m CFH telescope, using the UHAO adaptive optics system, are presented here. We report the detection of four arcs located in the vicinity of the F ring. They can be seen one day later in HST images. The combination of both data sets gives accurate determinations of their orbits. Semimajor axes range from 140020 km to 140080 km, with a mean of 140 060 ± 60 km. This is about 150 km smaller than previous estimates of the F ring radius from Voyager 1 and 2 data, but close to the orbit of another arc observed at the same epoch in HST images.
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