Voyager 1 images gave the first indication of a faint ring around Jupiter. The location of the ring is indicated by the white line. The thickness of the ring is estimated to be 30 km or less. Jupiter is about 142,000 km in diameter. The ring has a diameter of about 250,000 km. North is at 11:00
NASA
<a rel="nofollow" class="external free" href="http://nssdc.gsfc.nasa.gov/imgcat/higher_res/voyager/jupiter/vg1_p21259.tiff">http://nssdc.gsfc.nasa.gov/imgcat/higher_res/voyager/jupiter/vg1_p21259.tiff</a>