Orbital ATK Set to Launch Pegasus Rocket Carrying NASA's CYGNSS Spacecraft
Pegasus Launch will be 43rd Flight for World’s First Commercial Rocket Aboard the Company’s Stargazer L-1011 Airplane

Dulles, Virginia 11 December 2016 – Orbital ATK (NYSE: OA), a global leader in aerospace and defense technologies, announced it is prepared to launch the company’s air-launched Pegasus rocket aboard its Stargazer L-1011 airplane from Cape Canaveral on Monday, December 12 at approximately 8:24 a.m. EST. Pegasus will be carrying NASA’s Cyclone Global Navigation Satellite System (CYGNSS) to study the inner core of tropical cyclones. The data provided will help scientists and meteorologists better understand and predict the path of a hurricane.

Live coverage of the mission will be available on NASA Television starting two hours prior to launch at http://www.nasa.gov/ntv. Details about the mission can be viewed at Orbital ATK’s mission page.

Pegasus is the world’s first privately developed commercial rocket and the leading launch system for the deployment of small satellites into Low-Earth orbit. The Pegasus rocket is launched from beneath Orbital ATK's Stargazer L-1011 carrier airplane, providing customers with unparalleled flexibility to operate from virtually anywhere on Earth with minimal ground support requirements.
As a NASA Category 3 certified launch vehicle, Pegasus is able to launch NASA’s most valuable satellites. The launch was provided through NASA Launch Services Program (LSP) who acts as a broker, matching spacecraft with launch vehicles. This will be the first Pegasus mission in 13 years to launch from Cape Canaveral. The previous 42 Pegasus missions have been conducted from six separate sites in the U.S., Europe and the Marshall Islands.

About Orbital ATK

Orbital ATK is a global leader in aerospace and defense technologies. The company designs, builds and delivers space, defense and aviation systems for customers around the world, both as a prime contractor and merchant supplier. Its main products include launch vehicles and related propulsion systems; missile products, subsystems and defense electronics; precision weapons, armament systems and ammunition; satellites and associated space components and services; and advanced aerospace structures. Headquartered in Dulles, Virginia, Orbital ATK employs approximately 12,000 people in 18 states across the U.S. and in several international locations. For more information, visit www.orbitalatk.com.

# # #

Print Press Release

Media Contact
Trina Helquist
(801) 699-0943
trina.helquist@orbitalatk.com
Investor Contact
Barron Beneski
(703) 406-5528
barron.beneski@orbitalatk.com
Media Contact
 Helquist
(801) 699-0943
trina.helquist@orbitalatk.com
Investor Contact
Barron Beneski
(703) 406-5528
barron.beneski@orbitalatk.com