This is the 14th planned flight of the Orbital ATK's uncrewed resupply spacecraft Cygnus and its 13th flight to the International Space Station under the Commercial Resupply Services contract with NASA. Spacecraft carries the name of Robert Henry Lawrence Jr., honouring USA's first black astronaut.
Northrup Grumman Innovation Systems designs, builds and delivers space, defence and aviation-related systems to customers around the world. They aquired Orbital ATK in 2018 along with its launchers and ongoing missions. Antares launches from Wallops in Virginia. Minotaur has many launch sites, with the most active now being Cape Canaveral and Vandenberg. Pegasus is an air launched vehicle from an aircraft and so has many launch locations.