DULLES, Va., Nov. 7 /PRNewswire/ -- Orbital Sciences Corporation (NYSE: ORB), one of the world's leading space technology and satellite services companies, today announced that it will release financial results for its third quarter ended September 30, 2000 prior to the opening of the financial markets on Thursday, November 9.

Following the release, the company's senior executives will conduct a conference call to discuss the third quarter results as well as the outlook for the fourth quarter of 2000. Leading the conference call will be Mr. David W. Thompson, Orbital's Chairman and Chief Executive Officer; Mr. James R. Thompson, Orbital's President and Chief Operating Officer; and Mr. Garrett E. Pierce, Orbital's Executive Vice President and Chief Financial Officer. The conference call will begin at 9:00 a.m. (EDT) and will be broadcast live over the Internet.

For webcast registration and information, please visit Orbital's web site at http://www.orbital.com/investor or go to http://www.vcall.com . It is advisable to register at least 20 minutes prior to the call to download and install any necessary audio software.

To access the conference call, dial 712-257-2397, and use the passcode "Taurus." A replay of the conference call will be available from approximately 11:30 a.m. on November 9 until 12:00 p.m. on November 14. For access to the conference call replay, dial 402-998-1046.

Orbital is one of the largest space technology and satellite services companies in the world, with 1999 total enterprise revenues (including revenues from unconsolidated affiliates) of approximately $915 million. The company, headquartered in Dulles, Virginia, employs about 4,500 people at major facilities in the United States, Canada and several overseas locations.

Orbital is the world's leading manufacturer of low-cost space systems, including satellites, launch vehicles, electronics and sensors, satellite ground systems and related digital infrastructure. Its Magellan subsidiary is a pioneer in satellite-based navigation and communications products for consumer and industrial markets. Through its ORBCOMM and ORBIMAGE affiliates and ORBNAV subsidiary, Orbital is also a major operator of satellite-based networks that provide data communications, high-resolution imagery and automotive information services to customers all around the world. More information about Orbital can be found at http://www.orbital.com . SOURCE Orbital Sciences Corporation

CONTACT: Media: Barron Beneski, 703-406-5000, email: beneski.barron@orbital.com, or Investors: Timothy Perrott, 703-406-5997, email: perrott.timothy@orbital.com, both of Orbital Sciences Corporation/