Which Saturn ring contains the Encke and Keeler gaps?

The Encke and Keeler gaps are both located in Saturn’s A Ring.

The A Ring is Saturn’s outermost major bright ring, lying just beyond the Cassini Division. The wider Encke Gap is about 325 kilometers across and is maintained by the small moon Pan, which orbits inside it. The much narrower Keeler Gap lies closer to the A Ring’s outer edge and is cleared by the moon Daphnis.

The names can cause confusion. The Encke Gap honors astronomer Johann Encke, although James Edward Keeler discovered it in 1888. The Keeler Gap was discovered later in Voyager images and honors Keeler himself. Modern terminology distinguishes a “gap,” which lies within a ring, from a broader “division” between major rings.

The A Ring is not the same as the F Ring, which lies farther outward and is much thinner and more dynamically active. Saturn’s prominent Cassini Division, meanwhile, separates the A and B rings rather than belonging to either one.