ISS Commercial Resupply Services Mission (ORB-2) Update

Orbital announced today that the launch of Antares for the Orb-2 Commercial Resupply Services mission to the International Space Station has been rescheduled for Saturday, July 12 at 1:14 p.m. EDT. Due to severe thunderstorms in the Wallops area the night of Tuesday, July 8, the rollout of the Antares rocket to its launch pad at the Mid-Atlantic Regional Spaceport scheduled for this morning was delayed resulting in a compression of the operational schedule leading to the launch. This afternoon, the company’s launch team determined the best course of action would be to postpone the launch one day to allow for normal launch operations processing. Despite the one day schedule slip, Cygnus will still arrive at the ISS on July 15 with berthing scheduled at approximately 7:24 a.m. EDT.

About Orbital

Orbital develops and manufactures small- and medium-class rockets and space systems for commercial, military and civil government customers. The company’s primary products are satellites and launch vehicles, including low-Earth orbit, geosynchronous-Earth orbit and planetary exploration spacecraft for communications, remote sensing, scientific and defense missions; human-rated space systems for Earth-orbit, lunar and other missions; ground- and air-launched rockets that deliver satellites into orbit; and missile defense systems that are used as interceptor and target vehicles. Orbital also provides satellite subsystems and space-related technical services to U.S. Government agencies and laboratories.  More information about Orbital can be found at http://www.orbital.com.  Follow the company on Twitter @OrbitalSciences.

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Contact:        

Barron Beneski (703) 406-5528

Public and Investor Relations

Orbital Sciences Corporation