No there is not. But if it is your intention to mark a place in the timeline (precisely), whilst working in other places in the timeline, I might help to place a (timeline) marker at the scrubber/cursor position. Multiple markers are possible if need be with their own colors. PD will also see these markers as a "clicking" point, so when you move something in the timeline you can click it to a marker.
Hope that this helps.
Have fun,
Warry