All About Saturn

Saturn's Rings Radius Radius approx. approx. Name inner outer width position mass (kg) ---- ------ ------ ----- -------- -------- D-Ring 67,000 74,500 7,500 (ring) Guerin Division C-Ring 74,500 92,000 17,500 (ring) 1.1e18 Maxwell Division 87,500 88,000 500 (divide) B-Ring 92,000 117,500 25,500 (ring) 2.8e19 Cassini Division 115,800 120,600 4,800 (divide) Huygens Gap 117,680 (n/a) 285-440 (subdiv) A-Ring 122,200 136,800 14,600 (ring) 6.2e18 Encke Minima 126,430 129,940 3,500 29%-53% Encke Division 133,410 133,740 Keeler Gap 136,510 136,550 F-Ring 140,210 30-500 (ring) G-Ring 165,800 173,800 8,000 (ring) 1e7? E-Ring 180,000 480,000 300,000 (ring) Notes: * distance is kilometers from Saturn's center * the "Encke Minima" is a slang term used by amateur astronomers, not an official IAU designation This categorization is actually somewhat misleading as the density of particles varies in a complex way not indicated by a division into neat regions: there are variations within the rings; the gaps are not entirely empty; the rings are not perfectly circular.

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