Orbital to Announce Fourth Quarter and Year-End 2000 Financial Results On April 17

8:30 a.m. Conference Call to be Broadcast Over the Internet



Apr 16, 2001, 01:00 ET from Orbital Sciences Corporation

    DULLES, Va., April 16 /PRNewswire/ -- Orbital Sciences Corporation
 (NYSE:   ORB) today announced that it will release its fourth quarter and year-
 end 2000 financial results prior to the opening of the market on Tuesday,
 April 17, 2001, and will conduct a conference call at 8:30 a.m. (EDT)
 tomorrow.  The conference call will be hosted by Orbital's senior 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 access the conference call, dial 888-709-9516, and use the passcode
 "Orbital."  A replay of the conference call will be available an hour after
 the end of the call and will remain active until 5:00 p.m. on April 24.  For
 access to the conference call replay, dial 888-282-0031 (international callers
 should dial 402-998-0515) and use the passcode "5895."
     For webcast registration and information, please visit Orbital's web site
 at http://www.orbital.com/investor or go to http://www.streetfusion.com .  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 manufacturers of low-cost space
 systems, including satellites, launch vehicles, space sensors and satellite
 ground systems.  Orbital is also involved with satellite-based networks that
 provide wireless data communications and high-resolution Earth imagery to
 customers around the world.
     More information about Orbital can be found at http://www.orbital.com .
 
     CONTACT: Media: Barron Beneski, 703-406-5528, or
 beneski.barron@orbital.com; or Investors: Tim Perrott, 703-406-5997, or
 perrott.timothy@orbital.com, both of Orbital Sciences Corporation.
 
 

SOURCE Orbital Sciences Corporation
    DULLES, Va., April 16 /PRNewswire/ -- Orbital Sciences Corporation
 (NYSE:   ORB) today announced that it will release its fourth quarter and year-
 end 2000 financial results prior to the opening of the market on Tuesday,
 April 17, 2001, and will conduct a conference call at 8:30 a.m. (EDT)
 tomorrow.  The conference call will be hosted by Orbital's senior 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 access the conference call, dial 888-709-9516, and use the passcode
 "Orbital."  A replay of the conference call will be available an hour after
 the end of the call and will remain active until 5:00 p.m. on April 24.  For
 access to the conference call replay, dial 888-282-0031 (international callers
 should dial 402-998-0515) and use the passcode "5895."
     For webcast registration and information, please visit Orbital's web site
 at http://www.orbital.com/investor or go to http://www.streetfusion.com .  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 manufacturers of low-cost space
 systems, including satellites, launch vehicles, space sensors and satellite
 ground systems.  Orbital is also involved with satellite-based networks that
 provide wireless data communications and high-resolution Earth imagery to
 customers around the world.
     More information about Orbital can be found at http://www.orbital.com .
 
     CONTACT: Media: Barron Beneski, 703-406-5528, or
 beneski.barron@orbital.com; or Investors: Tim Perrott, 703-406-5997, or
 perrott.timothy@orbital.com, both of Orbital Sciences Corporation.
 
 SOURCE  Orbital Sciences Corporation