diff --git a/src/data/defs.txt b/src/data/defs.txt
index 4e67eb0..aca5e69 100644
--- a/src/data/defs.txt
+++ b/src/data/defs.txt
@@ -145,7 +145,7 @@ actor 0 0 0
             id thebe
             orbitaround jupiter 221900e3
             tidally locked
-            scale 50e3
+            scale 49.3e3
             moon yes
             collider handcrafted
             angularmomentum 0 0 0