Launch probability: 100%

This is the 12th planned flight of the Orbital ATK's uncrewed resupply spacecraft Cygnus and its 11th flight to the International Space Station under the Commercial Resupply Services contract with NASA. Northrop Grumman named the vehicle after Apollo 1 astronaut Roger Chaffee.

Mission type: Resupply · Orbit: Low Earth Orbit

Rocket: Antares 230 · Provider: Northrop Grumman Space Systems