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Keeler Gap
~42 km
Measured
Saturn’s outer A ring. Keeler Gap about 42 km wide. Daphnis orbits inside it.
The Keeler Gap in Saturn’s outer A ring is about 42 km wide. Tiny Daphnis orbits in the lane and raises waves on both edges.
Documentary plate
NASA / JPL-Caltech / Space Science Institute. Cassini, 16 January 2017. PIA21056. Gap ~42 km.
What it supports
A Cassini image scale published by NASA/JPL. A real gap with a real shepherd.
What it does not
Not the 42 Cassini farewell frames. Not Mariner 10’s 42 km of Venus air. A ring lane is not a second Venus.
ExactnessApproximate
Form42
Unitkm
Strengthhard