diff --git a/src/defs.txt b/src/defs.txt
index 797b4b1..ff70fd5 100644
--- a/src/defs.txt
+++ b/src/defs.txt
@@ -80,6 +80,14 @@ actor 0 0 0 callisto
     moon yes
     physics off
 
+actor 0 0 0 jupiter
+    name Saturn
+    relativeto jupiter
+    orbit 655e9 0.30
+    radius 58232e3
+    sphere yes
+    physics off
+
 actor 0 0 0 moonlet
     name Thebe
     relativeto jupiter