Orbital Sciences Corporation (commonly referred to as
Orbital) was an
American company specializing in the design, manufacture and launch of small- and medium- class
space and
rocket systems for commercial, military and other government customers. It was headquartered in
Dulles,
Virginia and publicly traded on the
New York Stock Exchange with the ticker symbol
ORB. Orbital’s primary products are satellites and launch vehicles, including low-Earth orbit, geosynchronous-Earth orbit and planetary spacecraft for communications, remote sensing, scientific and defense missions; ground- and air-launched rockets that deliver satellites into orbit; missile defense systems that are used as interceptor and target vehicles; and
human-rated space systems for Earth-orbit, lunar and other missions. Orbital also provided satellite subsystems and space-related technical services to government agencies and laboratories.