9:00 a.m. Conference Call With Financial Analysts And Investors to Be Webcast

Orbital Sciences
Corporation will release its fourth quarter and year-end 2001
financial results prior to the opening of the market on Thursday, March 7,
2002, the company announced today.
Orbital will also conduct a conference
call with financial analysts and investors Thursday morning, beginning at 9:00
a.m. (EST), which will be hosted by senior company executives, including:

  • Mr. David W. Thompson, Chairman and Chief Executive Officer
  • Mr. James R. Thompson, President and Chief Operating Officer
  • Mr. Garrett E. Pierce, Executive Vice President and Chief Financial

Officer

To listen to the conference call, dial 888-541-8767, and use the password
“Orbital.”
A replay of the conference call will be available about an hour
after the end of the call and will remain active for one week, until 5:00 p.m.
on Thursday, March 14.
For access to the conference call replay, dial
800-642-1687 (international callers should dial 706-645-9291) and use the
conference ID number 3321167.

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

Orbital is one of the world’s leading developers and manufacturers of
affordable space systems for commercial, civil government and military
customers.
The company’s primary products are spacecraft and launch vehicles,
including low-orbit, geostationary and planetary spacecraft for
communications, remote sensing and scientific missions; ground- and air-
launched rockets that deliver satellites into orbit; and missile defense
boosters that are used as interceptor and target vehicles.
Orbital also
offers space-related technical services to government agencies and develops
and builds satellite-based transportation management systems for public
transit agencies and private vehicle fleet operators.

More information about Orbital can be found at http://www.orbital.com .

CONTACT:
Public and Investor Relations: Barron Beneski of Orbital
Sciences Corporation, +1-703-406-5528, beneski.barron@orbital.com.