Saturn's Rings

RINGDISTANCEWIDTHMASS
D67,000 km7,500 km?
C74,500 km17,500 km1.1x10^18 kg
Maxwell Gap87,500 km270 km-
B92,000 km25,500 km2.8x10^19 kg
Cassini Div117,500 km4,700 km5.7x10^17 kg
A122,200 km14,600 km6.2x10^18 kg
Encke Gap133,570 km325 km-
Keeler Gap136,530 km35 km-
F140,210 km30-500 km?
G165,800 km8,000 km6-23x10^6 kg
E180,000 km300,000 km?

(distance is from Saturn's center to the ring's edge)