Atlas V • OA-4

A United Launch Alliance Atlas 5 rocket, also known as AV-061, will launch the fifth Orbital Sciences Cygnus cargo freighter on its fourth operational cargo delivery flight to the International Space Station. The mission codename is OA-4. The rocket will fly in the 401 vehicle configuration with a four-meter fairing, no solid rocket boosters and a single-engine Centaur upper stage. Delayed from 2015/11/19; Due the weather conditions postponed from 3rd, 4th and 5th December 2015.