The phrase "right trajectory" means moving in the correct direction or following the right path to achieve a particular goal or success. Full definition
With enough fuel and the right trajectory, Falcon Heavy has enough thrust to launch a payload heavier than a car to Pluto, let alone Mars. (businessinsider.com)
With enough fuel and the right trajectory, the system has enough thrust to launch a payload heavier than a car to Pluto. (businessinsider.com)
She told Premier: «It is really hard to see this happen in Sri Lanka because since 2015... Sri Lanka has been on the right trajectory; it's been much, much better.» (premierchristianity.com)