-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, JRBOOj2X2avt75sgDoh3vRYKO3n9pdsS9xQLFBG0Jfexg73FOaOTsPbLC4d0VRem 93gnefs/fyj+P1g4Gnq8qQ== 0001140361-11-006439.txt : 20110204 0001140361-11-006439.hdr.sgml : 20110204 20110204171531 ACCESSION NUMBER: 0001140361-11-006439 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20110201 FILED AS OF DATE: 20110204 DATE AS OF CHANGE: 20110204 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Thompson Hollis M CENTRAL INDEX KEY: 0001490183 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-14279 FILM NUMBER: 11575673 MAIL ADDRESS: STREET 1: 21839 ATLANTIC BOULEVARD CITY: DULLES STATE: VA ZIP: 20166 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: ORBITAL SCIENCES CORP /DE/ CENTRAL INDEX KEY: 0000820736 STANDARD INDUSTRIAL CLASSIFICATION: RADIO & TV BROADCASTING & COMMUNICATIONS EQUIPMENT [3663] IRS NUMBER: 061209561 STATE OF INCORPORATION: DE FISCAL YEAR END: 1204 BUSINESS ADDRESS: STREET 1: 21839 ATLANTIC BLVD CITY: DULLES STATE: VA ZIP: 20166 BUSINESS PHONE: 703 406 5524 MAIL ADDRESS: STREET 1: 21839 ATLANTIC BLVD STREET 2: 21839 ATLANTIC BLVD CITY: DULLES STATE: VA ZIP: 20166 FORMER COMPANY: FORMER CONFORMED NAME: ORBITAL SCIENCES CORP II DATE OF NAME CHANGE: 19900212 4 1 doc1.xml FORM 4 X0303 4 2011-02-01 0 0000820736 ORBITAL SCIENCES CORP /DE/ ORB 0001490183 Thompson Hollis M C/O ORBITAL SCIENCES CORP 21839 ATLANTIC BLVD. DULLES VA 20166 0 1 0 0 Senior VP and Controller Common Stock 2011-02-01 4 M 0 8500 4.00 A 38386 D Common Stock 2011-02-01 4 S 0 8500 17.50 D 29886 D Employee Stock Option (right to buy) 4.00 2011-02-01 4 M 0 8500 0 D 2011-04-24 Common Stock 8500 0 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 15, 2010. The option, representing a right to purchase a total of 10,000 shares, vested in three installments on April 24, 2001, February 6, 2002 and February 6, 2003. Exhibit List Exhibit 24 Power of Attorney /s/ James S. Black, Attorney-in-Fact 2011-02-04 EX-24 2 poa1.htm POWER OF ATTORNEY Unassociated Document
POWER OF ATTORNEY


KNOW ALL BY THESE PRESENTS, that the undersigned hereby constitutes and appoints James S. Black the undersigned's true and lawful attorney-in-fact to:

(1)           execute for and on behalf of the undersigned, in the undersigned's capacity as an officer and/or director of Orbital Sciences Corporation (the “Company”), Forms 3, 4 and 5 in accordance with Section 16(a) of the Securities Exchange Act of 1934 and the rules thereunder;

(2)           do and perform any and all acts for and on behalf of the undersigned which may be necessary or desirable to complete and execute any such Form 3, 4 or 5 and timely file such form with the United States Securities and Exchange Commission and any stock exchange or similar authority; and

(3)           take any other action of any type whatsoever in connection with the foregoing which, in the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact's discretion.

The undersigned hereby grants to such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be done by virtue of this power of attorney and the rights and powers herein granted.  The undersigned acknowledges that the foregoing attorney-in-fact, in serving in such capacity at the request of the undersigned, is not assuming, nor is the Company a ssuming, any of the undersigned's responsibilities to comply with Section 16 of the Securities Exchange Act of 1934.

This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file Forms 3, 4 and 5 with respect to the undersigned's holdings of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorney-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this 4th day of February, 2011.

Officer

/s/ Hollis M. Thompson
Hollis M. Thompson


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