NG-11, previously known as OA-11, is the twelfth flight of the Northrop Grumman robotic resupply spacecraft Cygnus and its eleventh flight to the International Space Station under the Commercial Resupply Services (CRS-1) contract with NASA.

[12] The mission launched on 17 April 2019, at 20:46:07 UTC from Wallops Island, Virginia.

The Cygnus service module is mated with the pressurized cargo module at the launch site, and mission operations are conducted from control centers in Dulles, Virginia and Houston, Texas.

[14] On 17 April 2019 at 20:46:07 UTC, Antares launched the NG-11 mission to the International Space Station from Wallops Island, Virginia.

[4] Smallsats deployed during NG-11: New hardware, known as the Thermal Amine Scrubber, the first Exploration ECLSS Tech Demonstration aboard ISS, which will be activated in April 2019 and scrub additional CO2 from the ISS atmosphere.