diff --git a/nav.py b/nav.py
index 17a25c1..51398f5 100644
--- a/nav.py
+++ b/nav.py
@@ -16,6 +16,7 @@ DISTANCES = {
     ("mars", "phobos"): 0.01,
     ("mars", "deimos"): 0.02,
     ("venus", "mercury"): 50.0,
+    ("mars", "ceres"): 263.0,
 }
 
 # Every route starts at Earth.
@@ -26,6 +27,7 @@ ROUTES = {
     "phobos": ["earth", "gateway", "mars", "phobos"],
     "deimos": ["earth", "gateway", "mars", "deimos"],
     "mercury": ["earth", "gateway", "venus", "mercury"],
+    "ceres": ["earth", "gateway", "mars", "ceres"],
 }
 
 NAMES = {
@@ -37,6 +39,7 @@ NAMES = {
     "phobos": "Phobos",
     "deimos": "Deimos",
     "mercury": "Mercury",
+    "ceres": "Ceres",
 }
 
 CRUISE_SPEED = 0.87  # million km per day