Washington, D.C. 20549

                                  SCHEDULE 13G
                    Under the Securities Exchange Act of 1934

                            Prospect Acquisition Corp.
                                (Name of Issuer)

                         Common Stock par value $0.0001
                         (Title of Class of Securities)

                                (CUSIP Number)

                              December 31, 2008
             (Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

[X] Rule 13d-1(b)

[ ] Rule 13d-1(c)

[ ] Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the

                               CUSIP No. 74347T103

       1.    Names of Reporting Person

	     Aldebaran Investments LLC

	     I.R.S. Identification Nos. of above persons: 205526257

       2.    Check the Appropriate Box if a Member Of a Group

             [ ] (a)
             [ ] (b)

       3.    SEC Use Only

       4.    Citizenship or Place of Organization

             Delaware, United States

       5.    Sole Voting Power: 1,916,820
Number of
Shares           6.  Shared Voting Power: 0
Owned by         7.  Sole Dispositive Power:  1,916,820
Each Reporting
Person With      8.  Shared Dispositive Power: 0

       9.    Aggregate Amount Beneficially Owned by Each Reporting Person

       10.   Check if the Aggregate Amount in Row (9) Excludes Certain Shares
             (See Instructions)

       11.   Percent of Class Represented by Amount in Row (9) 6.13%

       12.   Type of Reporting Person (See Instructions) IA

Item 1. (a)  Issuer: Prospect Acquisition Corp.

        (b)  Address: 695 East Main Street
                      Stamford, CT 06901 USA

Item 2. (a)  Name of Person Filing:

             Aldebaran Investments LLC

        (b)  Address of Principal Business Offices:

             500 Park Avenue
	     5th Floor
	     New York, NY 10022

        (c)  Citizenship:

             Delaware, United States

        (d)  Title of Class of Securities
             Common stock par value $0.0001

        (e)  CUSIP Number: 74347T103

Item 3.  Aldebaran Investments LLC is an investment advisor in accordance
         with Rule 13d-1(b)(1)(ii)(E);

Item 4.  Ownership

        a. Amount beneficially owned: 1,916,820

	b. Percent of Class: 6.13%

	c. Number of shares as to which the person has:

		(i) Sole power to vote or to direct the vote 1,916,820

		(ii) Shared power to vote or to direct the vote	  0

		(iii)Sole power to dispose or to direct the disposition of 1,916,820

		(iv) Shared power to dispose or to direct the disposition   0

Item 5.  Ownership of Five Percent or Less of a Class

         Not Applicable

Item 6.  Ownership of More than Five Percent on Behalf of Another Person

	 Aldebaran Investments LLC is the investment manager of a separate
         account which owns 6.13% of the common shares of Prospect Acquisition
         Corp.  Aldebaran Investments LLC is deemed to be the beneficial owner
         of these shares and they are included in the total amount beneficially
         owned presented in Item 4.

Item 7.  Identification and Classification of the Subsidiary Which Acquired the
         Security Being Reported on By the Parent Holding Company

         Not Applicable

Item 8.  Identification and Classification of Members of the Group

         Not Applicable

Item 9.  Notice of Dissolution of Group

         Not Applicable

Item 10. Certification

         By signing below I certify that, to the best of my knowledge and
belief, the securities referred to above were acquired and held in the ordinary
course of business and were not acquired and are not held for the purpose of or
with the effect of changing or influencing the control of the issuer of the
securities and were not acquired and are not held in connection with or as a
participant in any transaction having that purpose or effect.


After reasonable inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

Date:  February 17, 2009
                                       ALDEBARAN INVESTMENTS LLC

                                       By: /s/ Adam L. Scheer
                                       Name: Adam L. Scheer
                                       Title: Principal