On December 06, 2015 at 21:44 UTC the "Cygnus” privately owned U.S. unmanned supply spacecraft was launched from Cape Canaveral launch site of US Air Force. The launch was performed by United Launch Alliance supported by the 45th Space Wing of US Air Force. The spacecraft was orbited by the “Atlas V” rocket-carrier. The "Cygnus” (CRS OA-4, “Deke Slayton II”) unmanned supply spacecraft, built by U.S. space firm Orbital Sciences Corp., was orbited by the “Atlas V” rocket-carrier on its cargo resupply mission to the International Space Station. CRS means Commercial Resupply Services. Bound for the International Space Station, the launch was the first Cygnus flight since last October’s failure, and the first mission for NASA’s Commercial Resupply Services program since the loss of a SpaceX Dragon resupply mission in June. The "Cygnus” (CRS OA-4), also known as Orbital Sciences CRS Flight 4 was the fourth successful flight of the Orbital ATK uncrewed resupply spacecraft Cygnus and its third flight to the International Space Station under the Commercial Resupply Services contract with NASA. The launch also marked the debut of an enhanced Cygnus vehicle, using an enlarged pressurised module to accommodate a larger payload than on earlier missions. The spacecraft was named the SS Deke Slayton II after American astronaut Deke Slayton. OA-4 is the second Cygnus to bear his name; the vehicle which was lost in October 2014 was also named the SS Deke Slayton.