|Mission type||ISS resupply
|Spacecraft type||Standard Cygnus|
Thales Alenia Space
|Start of mission|
|Launch date||August 2013 (planned)|
|Launch site||MARS LP-0A|
|Berthing at ISS|
|Berthing port||Harmony nadir|
Cygnus 1,[verification needed] also known as Orbital Sciences COTS Demo Flight, is the first planned flight of the Orbital Sciences' unmanned resupply spacecraft Cygnus, its first flight to the International Space Station and the second launch of the company's Antares launch vehicle. The flight is under contract to NASA as Cygnus' demonstration mission in the Commercial Orbital Transportation Services (COTS) program. The mission was scheduled to launch in June 2013. When berthed, it will become the 5th unmanned vehicle type to deliver supplies to the station. The other vehicles are the Progress, ATV, HTV and the Dragon. The Cygnus is expected to deliver 550 kg (1,200 lb) of cargo to ISS and dispose of about 1,000 kg (2,200 lb) through destructive reentry.
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- Bergin, Chris (2012-02-22). "Space industry giants Orbital upbeat ahead of Antares debut". NasaSpaceflight (not affiliated with NASA). Retrieved 29 March 2012.
- "Worldwide launch schedule". spaceflightnow.com. Retrieved 2013-02-12.
- "Worldwide Launch Schedule". Spaceflight Now Inc. October 3, 2012. Retrieved October 3, 2012.
- Beneski, Barron (1 October 2012). "Orbital Begins Antares Rocket Operations at Mid-Atlantic Regional Spaceport". Orbital Sciences. Retrieved 2 October 2012.
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