Physical characteristics of" wisps" in the outer edge of the Keeler Gap in Saturn's rings

We present a catalog of detected wisps , small protrusions of material (0.5 to 2 km) into the Keeler Gap of Saturn s rings from the gap s outer edge. Wisps are characterized by a sharp trailing edge followed by a slow gradation back into the edge on the leading side, typically extending between 0.1 and 1 degree of longitude (240 to 2400 km). Fewer than 1% of observed wisps deviate from this morphology, the variants having either the sharp edge on the leading side (reversed) or having a more complex morphology (often roughly ...