Centaur Upper Stage for Cygnus OA-4

The single-engine Centaur upper stage slated to help deliver the next U.S. cargo delivery to the International Space Station arrives at the Atlas Spaceflight Operations Center near Space Launch Complex 41. It was transported from the Horizontal Integration Facility at Space Launch Complex 37. The upper stage will top the United Launch Alliance Atlas V rocket set to launch Orbital ATK’s Cygnus spacecraft on a flight to carry equipment, supplies and research to the orbiting laboratory in December. The unpiloted flight will be Orbital’s fourth commercial resupply mission to the station. It is targeted for liftoff Dec. 3 from Space Launch Complex 41.

Photo credit: NASA/Jim Grossmann