diff --git a/src/defs.txt b/src/defs.txt
index 26bee1d..ca15f20 100644
--- a/src/defs.txt
+++ b/src/defs.txt
@@ -86,8 +86,8 @@ actor 0 0 0 moonlet
     id thebe
     orbit 221900e3 0.66
     scale 50e3
-    mass 100000
-    angularmomentum 0 0.25 0
+    mass 430e15
+    angularmomentum 0 0.025 0
 
 actor 3000 0 0 moonlet
     name Moonlet