First, Janus travels in an unusual orbit around Saturn where it periodically trades places with its sister moon Epimetheus, which typically orbits about 50 kilometers away.

• 首先，土卫十以不同寻常的轨道绕土星运行，并且在运行过程中会与它的姐妹卫星土卫十一进行周期性的位置交换，两者的运行轨道仅仅相距50公里。