diff --git a/src/defs.txt b/src/defs.txt
index 27edfe2..b16bc9f 100644
--- a/src/defs.txt
+++ b/src/defs.txt
@@ -35,7 +35,7 @@ actor 10 -30 20 MeteorAceGT
 
 actor 0 0 0 io
     relativeto jupiter
-    orbit 421700e3 0.75
+    orbit 421700e3 0.65
     radius 1822e3
     rotationy -0.40
     angularmomentum 0 0.0001 0