The United Launch Alliance Atlas V rocket that will lift the Orbital ATK Cygnus spacecraft into orbit is the -401 version and is comprised of two stages with a 4-meter fairing covering the Cygnus to protect it during the climb through the dense lower atmosphere. The first stage, burning liquid oxygen and refined kerosene, will lift the rocket and payload off the pad and power the first four minutes, 15 seconds of flight. It will then separate, allowing the Centaur upper stage to fire for another 14 minutes to put the cargo-laden Cygnus on its correct course to catch the International Space Station. The Centaur is powered by super-cold liquid oxygen and hydrogen.