This is the demonstration mission under NASA's Commercial Resupply Service agreement with Orbital Sciences. The unmanned Cygnus cargo vessel delivered approximately 700kg of supplies and science experiments to the International Space Station.
Antares known during early development as Taurus II, is an expendable launch system developed by Orbital Sciences Corporation (now part of Northrop Grumman Innovation Systems after Northrop Grumman acquired Orbital ATK) and the Yuzhnoye Design Bureau to launch the Cygnus spacecraft to the International Space Station as part of NASA's COTS and CRS programs. Able to launch payloads heavier than 5,000 kg (11,000 lb) into low-Earth orbit, Antares is the largest rocket operated by Orbital ATK. Antares launches from the Mid-Atlantic Regional Spaceport and made its inaugural flight on April 21, 2013.See Antares Details
Cygnus Orb-D1, also known as Cygnus 1 and Orbital Sciences COTS Demo Flight, was the first flight of the Cygnus unmanned resupply spacecraft developed by Orbital Sciences Corporation. It was named after the late NASA astronaut and Orbital Sciences executive G. David Low. The flight was carried out by Orbital Sciences under contract to NASA as Cygnus' demonstration mission in the Commercial Orbital Transportation Services (COTS) program. Cygnus was the seventh type of spacecraft to visit the ISS, after the manned Soyuz and Space Shuttle, and unmanned Progress, ATV, HTV and Dragon.Cygnus Standard Details