High Quality Content by WIKIPEDIA articles! Orbital Sciences Corporation (OSC, though commonly referred to as Orbital) is a company which specializes in satellite launch and manufacture. Its Launch Systems Group is heavily involved with missile defense launch systems. Orbital formerly owned ORBIMAGE (now GeoEye) and the Magellan line of GPS receivers, though they are now divested (the latter to Thales). Orbital's NYSE ticker symbol is ORB. It has its headquarters in the Dulles area of unincorporated Loudoun County, Virginia, United States.