Rings of Neptune
The large Lassell Ring (1989 N4R), is a thin sheet extending for 4000 km inwards of about 59,200 km radius. It is dusty but less than some of the other rings, being comparable in this situation to the continuous piece of the Adams ring. There is a brightness enhencement on its outer edge which has been called the Arago Ring (1989 N5R), and the Lassell Ring's inner edge abuts the LeVerrier Ring.