diff --git a/docs/TODO b/docs/TODO
index 3e283f2..b4daabc 100644
--- a/docs/TODO
+++ b/docs/TODO
@@ -36,3 +36,5 @@ If you see modifications to this file in git status, IGNORE them and do not comm
     - for starters, the minimum scaling of objects should be replaced with some
         kind of billboard system
     - fix moon orbital path rendering, needs to use parent frame transform
+        also applies to the test_simple.toml config, both the comet, and the
+        parabolic body have incorrect orbit graphics