Pan is the innermost of Saturn¹'s known satellites:

　　orbit:    133,583 km from Saturn

　　diameter: 20 km

　　Pan was the god of woods, fields, and flocks, having a human torso and head with a goat's legs, horns, and ears.

　　Discovered by Mark R. Showalter in 1990 from Voyager photos. Recovered 24 years later in Cassini images.

　　Pan is within the Encke Division in Saturn's A ring.

　　Small moons near the rings produce wave patterns in the rings. Prior to the discovery of Pan, an analysis of the patterns in the edge of Saturn's A ring predicted the size and location of a small moon. Pan was discovered by reexamining the 10 year old Voyager photos at the predicted spot.

　　It is possible that there are more moons within Saturn's rings yet to be discovered.

　　土卫十八是已知土星卫星中最里面的一颗：

　　公转轨道:  距土星 133,583 千米

　　卫星直径:  20 千米

　　Pan是树林、田野和畜群之神，他有一个人的躯干和头，有山羊的腿、犄角和耳朵。

　　这颗卫星是在1990年由Mark R. Showalter从旅行者号传回的照片中发现的。

　　土卫十八在土星A光环带的Encke沟中。

　　光环附近的小卫星在光环中产生的波状图案。在发现土卫十八之前，一次对土星A光环的边缘的这种图案的研究预言了一颗小卫星的位置。依靠对10年前旅行者号的照片中在预言地点的再次研究发现了土卫十八。

　　可能有更多的在土星光环中的卫星将被发现。