About Orbital

Orbital Sciences Corporation (NYSE: ORB) was founded in 1982 with the goal of making space technology more affordable, accessible and useful to millions of people on Earth. Since then, we have grown to become the world's leading developer and manufacturer of smaller, more affordable space and rocket systems. We have pioneered new classes of launch vehicles, satellites and other space technologies. And we have seen these technologies become the building blocks of space-related systems used by our customers to defend our country, to provide global communications, to study the Earth, and to explore our solar system and the universe beyond.

As the industry leader in small space and rocket systems, Orbital provides a complete set of reliable, cost-effective products… from small geosynchronous Earth orbit (GEO) satellites for communications and broadcasting, low Earth orbit (LEO) spacecraft that perform remote sensing and scientific research, and planetary probes to explore deep space… to lightweight launch vehicles that transport satellites into orbit, target rockets used to test missile defense systems, and interceptor booster vehicles that are deployed to protect against enemy missile attack. We are also involved in several related businesses, including space engineering services and advanced transportation management systems. With this range of capabilities, the company is well positioned to capitalize on emerging opportunities in the global space market, which is estimated to exceed $100 billion in total demand in 2007.

Some general company "facts and figures" follow:

• Excellent product reliability record - 98% success rate on over 150 major space and rocket missions in the last seven years
• Substantial operational experience - more than 575 satellites, launch vehicles and other space-related systems delivered to customers since 1982
• Large, long-term contract backlog - approximately $4.0 billion to be completed over the next eight years
• Strong, experienced workforce - about 3,300 employees, including more than 1,660 engineers and scientists
• Modern industrial facilities - over 1,000,000 square feet of state-of-the-art office, R&D and manufacturing space
• All company operations have achieved ISO/AS 9100 quality management system certification
• Solid financial outlook and strong balance sheet - growing revenues, improving profits and cash flow, low debt levels