diff --git a/src/defs.txt b/src/defs.txt
index 899c1f1..a49b98d 100644
--- a/src/defs.txt
+++ b/src/defs.txt
@@ -90,9 +90,11 @@ actor 0 0 0 moonlet
 
 actor 3000 0 0 moonlet
     name Moonlet
+    collider mesh
     relativeto player
+    density 10000000000
     scale 500
-    angularmomentum 0 0.15 0
+    angularmomentum 0 0.015 0
 
 actor -200 -110 1000 satellite
     name "Communications Satellite"