Orbital Sciences Corporation
Orbital Sciences Corporation was a United States aerospace company that designed, manufactured, and launched satellites, launch vehicles, missile-defense systems, and human-spaceflight hardware.
Last updated August 26, 2026
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Overview
Orbital Sciences Corporation, commonly known as Orbital, was an American aerospace and defense company founded in 1982 by David W. Thompson, Bruce Walker Ferguson, and Scott L. Webster. The company developed a business around relatively small and medium-sized space systems for commercial operators, civil agencies, the U.S. military, and other government customers. Its portfolio covered spacecraft, launch vehicles, missile-defense targets and interceptors, human-rated cargo systems, satellite subsystems, and technical services. Orbital began by pursuing commercial and government opportunities in space transportation. One of its early breakthroughs was a 1985 NASA contract for Transfer Orbit Stage vehicles. The company expanded its rocket capabilities in 1988 by acquiring Space Data Corporation, a major supplier of suborbital rockets, and opened a production and engineering facility in Chandler, Arizona, the following year. In 1990, Orbital launched Pegasus, an air-launched rocket carried beneath the company's modified L-1011 aircraft, Stargazer. Pegasus established Orbital as a significant provider of launch services for small payloads and was followed by the company's initial public offering in the same year. The company broadened its satellite activities through acquisitions and internal development. Its spacecraft business supplied low-Earth-orbit communications satellites, geostationary communications platforms, Earth-imaging spacecraft, scientific and environmental satellites, and spacecraft buses. Orbital participated in the development of the ORBCOMM low-Earth-orbit data-communications network and built spacecraft for government, commercial, and scientific missions. The company also entered the geostationary communications market through its 1997 acquisition of CTA, Inc., and strengthened its satellite-manufacturing position in 2010 by acquiring General Dynamics' Gilbert, Arizona satellite-development and manufacturing unit. Orbital's launch portfolio eventually included Pegasus, Taurus, and the Minotaur family. Taurus, later renamed Minotaur-C, provided a larger ground-launched option for commercial and government payloads. Minotaur vehicles combined Orbital launch technology with government-supplied solid rocket motors, including motors derived from decommissioned Minuteman and Peacekeeper missile systems. In parallel, Orbital became an important supplier of suborbital target and interceptor vehicles used in U.S. missile-defense testing. The company also developed major scientific and human-spaceflight systems. Its Dawn spacecraft, launched in 2007, became the first spacecraft to orbit two extraterrestrial bodies during its mission to study Vesta and Ceres. In 2008, NASA selected Orbital for a Commercial Resupply Services contract to deliver cargo to the International Space Station. Orbital developed the Antares medium-class launch vehicle and Cygnus cargo spacecraft for that program; operational cargo flights began in 2013. Orbital provided engineering and technical personnel for space, science, and defense programs through its Technical Services Division. It also operated a Transportation Management Systems unit that combined satellite navigation and wireless communications for public-transit and service-vehicle fleet management. That unit was sold to Affiliated Computer Services in 2008. Orbital announced an agreement to combine with Alliant Techsystems in April 2014. The transaction closed on February 9, 2015, creating Orbital ATK and ending Orbital Sciences Corporation as an independent company. Northrop Grumman agreed to acquire Orbital ATK in 2017 and completed the transaction in June 2018. The former Orbital businesses subsequently became part of Northrop Grumman's space organization, later reorganized as Space Systems.
History
Orbital Sciences Corporation was incorporated in 1982 by David W. Thompson, Bruce Walker Ferguson, and Scott L. Webster, three former Harvard Business School classmates. Initial financing came from Texas businessmen Fred C. Alcorn and Sam Dunnam. The company initially concentrated on space transportation and related systems, securing a NASA contract in 1985 for Transfer Orbit Stage vehicles. Orbital began building a broader launch and spacecraft business during the late 1980s. In 1987 it investigated a low-Earth-orbit satellite system for collecting data from remote locations, an effort that contributed to the later ORBCOMM network. Its 1988 acquisition of Space Data Corporation added suborbital-rocket expertise and production capacity, while a new Chandler, Arizona facility supported the expanding launch-vehicle operation. The 1990 Pegasus launch was a defining moment. Pegasus used a carrier aircraft to release a rocket at altitude, giving small payload customers an alternative to conventional ground launches. Orbital carried out its initial public offering that year and began trading publicly. The company followed with the Taurus launch vehicle in 1994 and expanded its satellite business through acquisitions. It acquired Fairchild Industries' Space and Defense Corporation in 1994 and CTA, Inc. in 1997, gaining additional spacecraft engineering and geostationary communications capabilities. Orbital later sold the acquired electronics business in 2000. During the 2000s, Orbital developed into a diversified space and defense contractor. Its Space Systems Group built communications, imaging, scientific, environmental, and defense spacecraft. Its Launch Systems Group supplied Pegasus, Taurus, and Minotaur rockets and became a significant contractor for missile-defense target and interceptor launches. The company also delivered technical personnel and engineering services to government laboratories and space programs. In 2006 it marked its 500th mission since formation. Orbital's scientific work included the Dawn spacecraft, launched in 2007 to investigate Vesta and Ceres. Its human-spaceflight activities expanded substantially after NASA selected it in 2008 for Commercial Resupply Services. Orbital developed Antares and Cygnus to transport cargo to the International Space Station, with operational flights beginning in 2013. The company also pursued advanced national-security and flight-system programs, including work associated with an air-launched rocket concept for Stratolaunch Systems. Orbital maintained a range of facilities, including its headquarters and satellite-manufacturing operation in Dulles, Virginia; launch and spacecraft-processing activities at Wallops Island, Virginia; launch-vehicle operations in Chandler, Arizona; satellite manufacturing in Gilbert, Arizona; and engineering and defense activities at sites in Maryland, California, and Alabama. In April 2014, Orbital announced a definitive agreement to combine with Alliant Techsystems. The transaction closed on February 9, 2015, creating Orbital ATK, Inc. and ending Orbital Sciences Corporation as a standalone public company. Northrop Grumman announced its agreement to acquire Orbital ATK in September 2017. Following shareholder and regulatory approvals, the acquisition closed on June 6, 2018. The acquired business was initially organized as Northrop Grumman Innovation Systems and was later incorporated into Northrop Grumman's Space Systems organization.
- 2018
Acquisition by Northrop Grumman
[1]Northrop Grumman completes its acquisition of Orbital ATK.
- 2015
Merger creates Orbital ATK
[1]Orbital Sciences combines with Alliant Techsystems and ceases to operate independently.
- 2013
Antares inaugural launch
[1]Antares completes its first flight from Wallops Island, Virginia.
- 2008
NASA cargo-resupply award
[1]NASA selects Orbital to provide cargo transportation services for the International Space Station.
- 2007
Dawn launches
[1]The Dawn spacecraft begins its deep-space scientific mission.
- 2006
500th mission
[1]Orbital records its 500th mission since the company's founding.
- 1994
Taurus launch vehicle debuts
[1]Orbital conducts the first launch of Taurus, later renamed Minotaur-C.
- 1993
Headquarters moves to Dulles
[1]Orbital establishes its corporate headquarters in Dulles, Virginia.
- 1990
Pegasus launch and public offering
[1]Orbital performs the first Pegasus launch and becomes a publicly traded company.
- 1988
Space Data acquisition
[1]The acquisition of Space Data Corporation strengthens Orbital's suborbital-rocket business.
Products and positioning
Orbital positioned itself as a vertically capable space-systems supplier focused on affordable, operationally mature small and medium spacecraft and launch vehicles. Its strategy combined commercial space products with long-term civil-space and national-security contracts, allowing the company to serve communications, remote sensing, scientific exploration, missile defense, and human-spaceflight markets.
Air-launched space launch vehicle · 1990
Pegasus
Pegasus was Orbital's signature small-payload launch vehicle. Released from the company's Stargazer L-1011 carrier aircraft, it was designed to place small satellites into orbit without requiring a conventional fixed launchpad. The system became a core part of Orbital's commercial and government launch-services business and operated from multiple launch locations.
Ground-launched space launch vehicle · 1994
Taurus / Minotaur-C
Taurus was a ground-launched rocket developed for small and medium payloads. The vehicle was later renamed Minotaur-C. It extended Orbital's launch portfolio beyond air-launched Pegasus and was used for commercial and government missions.
Government and commercial launch vehicles · 2000
Minotaur family
Minotaur vehicles combined Orbital avionics, guidance, fairings, and upper-stage technologies with government-supplied solid rocket motors. The family included vehicles based on Minuteman and Peacekeeper stages and was intended primarily for government-sponsored payloads, including national-security and scientific spacecraft.
Medium-class space launch vehicle · 2013
Antares
Antares was developed to provide medium-class launch capability for civil, commercial, and government customers. Its principal Orbital-era role was launching Cygnus cargo spacecraft from Wallops Island on missions supporting NASA's International Space Station resupply program.
Uncrewed cargo spacecraft · 2013
Cygnus
Cygnus was Orbital's advanced maneuvering spacecraft developed for NASA's Commercial Resupply Services program. It carried pressurized cargo to the International Space Station and supported Orbital's entry into recurring human-spaceflight logistics. The spacecraft was designed for cargo delivery rather than crew transport.
Planetary science spacecraft · 2007
Dawn
Dawn was Orbital's first interplanetary spacecraft. Launched in 2007, it traveled to the main asteroid belt and studied Vesta and Ceres. The mission demonstrated Orbital's ability to build spacecraft for long-duration deep-space science in addition to Earth-orbiting applications.
Low-Earth-orbit communications system
ORBCOMM satellite network
ORBCOMM was a low-Earth-orbit satellite communications network intended to collect and relay data from remote locations. Orbital investigated the concept in the late 1980s and developed spacecraft associated with the constellation, extending the company's commercial satellite work into machine-to-machine and remote-data communications.
Spacecraft and satellite systems
Satellite platforms and imaging spacecraft
Orbital designed and manufactured small and medium spacecraft for communications, Earth imaging, environmental monitoring, science, and defense. Its work included geostationary communications platforms, low-Earth-orbit spacecraft, hosted payload systems, and imaging spacecraft such as the OrbView series.
Brand decisions
2017
Agree to Northrop Grumman acquisitionM&ABackground
Northrop Grumman sought to expand its aerospace and defense portfolio through the acquisition of Orbital ATK.
Action taken
Northrop Grumman announced an agreement to acquire Orbital ATK.
Aftermath
Shareholders approved the transaction, and regulators approved it with conditions before completion in 2018.
Cash consideration plus assumed debt. US$7.8 billion in cash plus assumption of approximately US$1.4 billion in debt (2017)
2014
Combine with Alliant TechsystemsM&ABackground
Orbital and Alliant Techsystems sought to combine complementary aerospace and defense businesses.
Action taken
Orbital announced a definitive agreement to merge with Alliant Techsystems, creating Orbital ATK.
Aftermath
The transaction closed in February 2015 and ended Orbital Sciences Corporation as an independent company.
Combined calendar-year 2013 revenue. Approximately US$4.5 billion (2013)
2010
Acquire General Dynamics satellite-manufacturing unitM&ABackground
Orbital aimed to complement its Dulles satellite operation and increase spacecraft-development capacity.
Action taken
Orbital acquired the Gilbert, Arizona satellite-development and manufacturing unit of General Dynamics.
Aftermath
The transaction strengthened Orbital's spacecraft-manufacturing footprint.
2008
Sell Transportation Management SystemsM&ABackground
Orbital's transportation-technology unit operated outside its core aerospace and defense focus.
Action taken
Orbital agreed to sell the Transportation Management Systems unit to Affiliated Computer Services.
Aftermath
The sale transferred the unit and approximately 130 to 140 employees to ACS.
Sale price. US$42.5 million (2008)
1997
Acquire CTA, Inc.M&ABackground
Orbital wanted a stronger position in the growing geostationary communications-satellite market.
Action taken
Orbital acquired CTA, Inc., a spacecraft design and manufacturing company.
Aftermath
The acquisition expanded Orbital's geostationary communications capabilities.
1988
Acquire Space Data CorporationM&ABackground
Orbital sought to broaden its rocket-manufacturing and suborbital-launch capabilities.
Action taken
Orbital acquired Space Data Corporation, a supplier of suborbital rockets.
Aftermath
The transaction supported expansion of Orbital's launch-vehicle business and its Chandler, Arizona operations.
Recent events
- 2018
Northrop Grumman completes Orbital ATK acquisition[1]
M&A
The acquisition was completed after regulatory review, and Orbital ATK became part of Northrop Grumman.
- 2017
Northrop Grumman announces agreement to acquire Orbital ATK[1]
M&A
Northrop Grumman announced a proposed acquisition of Orbital ATK, the successor company containing Orbital's former businesses.
- 2015
Orbital Sciences ceases to exist as an independent company[1]
M&A · Other
The merger with Alliant Techsystems closed, creating Orbital ATK and ending Orbital Sciences Corporation's independent corporate existence.
- 2014
Orbital announces combination with Alliant Techsystems[1]
M&A · Leadership change
Orbital announced a transaction to combine with Alliant Techsystems' aerospace and defense businesses.
- 2013
Antares makes inaugural launch[1]
Product launch · Product generation
Orbital's Antares rocket completed its first launch from Wallops Island, supporting the company's planned cargo-resupply missions.
- 2008
NASA selects Orbital for International Space Station cargo services[1]
Other
NASA awarded Orbital a Commercial Resupply Services contract for cargo transportation to and from the International Space Station.
- 2008
Orbital sells Transportation Management Systems unit[1]
M&A
Affiliated Computer Services agreed to acquire Orbital's transportation-management technology business.
- 2007
Orbital launches Dawn planetary spacecraft[1]
Product launch
Dawn began its long scientific mission to study bodies in the main asteroid belt, becoming one of Orbital's best-known science spacecraft.
- 1994
Orbital Sciences conducts first Taurus launch[1]
Product launch
Orbital successfully launched Taurus, expanding its launch portfolio beyond the Pegasus system.
- 1990
Orbital Sciences completes initial Pegasus launch[1]
Product launch · Product generation
The company successfully demonstrated its Pegasus air-launched rocket, an important step in establishing its commercial small-payload launch business.
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