diff --git a/nav.py b/nav.py
index 56c55ad..025c9f6 100644
--- a/nav.py
+++ b/nav.py
@@ -68,8 +68,8 @@ def plan(destination):
 
 
 def asteroid_route(belt):
-    # TODO: figure out how to route through the asteroid belt
-    return ROUTES["ceres"] +
+    """Return a route through the asteroid belt (currently: via Ceres)."""
+    return ROUTES["ceres"] + [belt]
 
 
 def print_plan(destination):