Jupiter & Saturn facts: they turn at the same speed ( 13, 10 km/sec.) as the move forward. which means with respect to the sun, their equator at noon is always at a near standstill. strange ? not at all:
The wheels on your car stands still on the ground in your driveway, and again at your destination , right? You can see the tire marks in the snow, mud.!. but the tires stand still on the ground all the way, Check the tire pattern on the road!
because like Jupiter , Saturn, your wheels turn backward, at the same rate as your car moves forward.
cycloid motion. NSW university.
http://www.sciforums.com/threads/jupiters-orbital-velocity-equatorial-velocity-cancel.159733/page-14