Orbital-D1, also known as Orb-D1, and Cygnus 1, was the first flight of the Cygnus cargo 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. The mission launched on 18 September 2013 at 14:58:02 UTC. Cygnus was the seventh type of spacecraft to visit the International Space Station (ISS), after the crewed Soyuz and Space Shuttle, and uncrewed Progress, ATV, HTV and Dragon 1.