disable jupiter orbital clock when not in orbit around jupiter

src/menu.rs

@@ -481,12 +481,21 @@ pub fn update_menu(
         id2pos.0.get(cmd::ID_PLAYER),
         id2pos.0.get(cmd::ID_JUPITER),
     ) {
+        let clock = if player_pos.y.abs() < 1e7 && player_pos.distance(*jupiter_pos) < 1e10
+        {
             let (clock_max, clock_current) =
                 nature::pos_to_orbit_time(*player_pos, *jupiter_pos, nature::JUPITER_MASS);
-        text.sections[0].value = format!(
-            "Orbital Clock:\n{} of {}\n{} {}",
+            format!(
+                "{} of {}",
                 nature::format_seconds_to_hour_min(clock_current),
-            nature::format_seconds_to_hour_min(clock_max),
+                nature::format_seconds_to_hour_min(clock_max)
+            )
+        } else {
+            String::from("ERROR: Not in orbit around Jupiter.")
+        };
+        text.sections[0].value = format!(
+            "Orbital Clock:\n{}\n{} {}",
+            clock,
             GAME_NAME,
             settings.version.as_str()
         );