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Cygnus is an expendable American automated cargo spacecraft designed for International Space Station (ISS) resupply missions. It was initially developed by Orbital Sciences Corporation with financial support from NASA under the Commercial Orbital Transportation Services (COTS) program.
Cygnus was developed by Orbital Sciences Corporation, partially funded by NASA under the agency's Commercial Orbital Transportation Services program. To create Cygnus, Orbital paired the Multi-Purpose Logistics Module, built by Thales Alenia Space and previously used by the Space Shuttle for ISS logistics, with a service module based on Orbital's GEOStar, a satellite bus.
Cygnus NG-19 was the eighth Cygnus mission under the Commercial Resupply Services-2 contract. Northrop Grumman Innovation Systems confirmed on 23 February 2021 that Thales Alenia Space of Turin, Italy, will fabricate two additional Pressurized Cargo Modules (PCMs) for a pair of forthcoming Commercial Resupply Services-2 missions.
The spacecraft was an Enhanced Cygnus, named the S.S. Patricia "Patty" Hilliard Robertson in honor of the NASA astronaut who died in a plane crash prior to being assigned to a crew to fly to the ISS. NG-20 was the first launch of a Cygnus spacecraft after Northrop Grumman exhausted the supply of its Antares 230+ rocket.
Commercial Orbital Transportation Services (COTS) was a NASA program to spur the development of private spacecraft and launch vehicles for deliveries to the International Space Station (ISS). Launched in 2006, COTS successfully concluded in 2013 after completing all demonstration flights.
The Cygnus Orb-D1 mission was the first flight of the Cygnus spacecraft and used the standard configuration with a Pressurized Cargo Module (PCM), [2] built by Thales Alenia Space, in Italy. [10] Orbital named this mission's Cygnus spacecraft the G. David Low after the former NASA astronaut and Orbital employee who died of cancer on 15 March 2008.
In an Orbital ATK tradition, this Cygnus spacecraft was named the S.S. John Young. He was the only person to fly twice on each of three NASA programs which included Gemini, Apollo, and the Space Shuttle. John Young died on 5 January 2018 at the age of 87. Northrop Grumman launches Cygnus NG-10
The mission was the first flight of the enhanced variant of Orbital ATK's Cygnus spacecraft, capable of delivering more than 3,500 kg (7,700 lb) of essential crew supplies, equipment and scientific experiments to the International Space Station (ISS). Total cargo: 3,349 kilograms (7,383 lb) [5] [12] Crew supplies: 1,181 kg (2,604 lb)