UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT
                       PURSUANT TO SECTION 13 OR 15(D) OF
                       THE SECURITIES EXCHANGE ACT OF 1934

       Date of Report (Date of earliest event reported): January 14, 2005


                    RESIDENTIAL ASSET SECURITIES CORPORATION,
                  on behalf of the RASC Series 2004-KS12 Trust
             (Exact name of registrant as specified in its charter)

           Delaware                    333-108865-12             51-0362653
-------------------------------  -------------------------  -------------------
(State or other jurisdiction of  (Commission File Number)      (IRS Employer
        incorporation)                                      Identification No.)

          8400 Normandale Lake Boulevard, Suite 250
                   Minneapolis, Minnesota                        55437
----------------------------------------------------       --------------------
           (Address of principal executive office)            (Zip Code)

                                 (952) 857-7000
--------------------------------------------------------------------------------
              (Registrant's telephone number, including area code )


                                       N/A
             (Former name or address, if changed since last report)

Check  the  appropriate  box  below  if the  Form  8-K  filing  is  intended  to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

[ ] Written communication  pursuant to Rule 425 under the Securities Act (17 CFR
230.425)

[ ] Soliciting  material  pursuant to Rule 14a-12 under the Exchange Act (17 CFR
240.14a-12)

[ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
Act (17 CFR 240.14d-2(b))

[ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
Act (17 CFR 240.13e-4(c))



<PAGE>


                    INFORMATION TO BE INCLUDED IN THE REPORT

SECTION 8 - OTHER EVENTS.

ITEM 8.01.        OTHER EVENTS.


On December  29,  2004,  Residential  Asset  Securities  Corporation  caused the
issuance and sale of the Residential  Asset  Securities  Corporation Home Equity
Mortgage Asset-Backed Pass-Through Certificates, Series 2004-KS12, pursuant to a
Pooling and Servicing Agreement, dated as of December 1, 2004, among Residential
Asset Securities Corporation, as depositor,  Residential Funding Corporation, as
master  servicer,  and the U.S.  Bank  National  Association,  as  trustee.  The
mortgage loans were sold to Residential Asset Securities Corporation pursuant to
an Assignment and Assumption  Agreement,  dated as of December 29, 2004, between
Residential Funding Corporation and Residential Asset Securities Corporation.

SECTION 9 - FINANCIAL STATEMENTS AND EXHIBITS

ITEM 9.01 (C). EXHIBITS.


         (c)      Exhibits:  The following  execution  copies of Exhibits to the
                  Form S-3  Registration  Statement of the Registrant are hereby
                  filed.

                      10.1     Pooling  and  Servicing  Agreement,  dated  as of
                               December  1,  2004,   among   Residential   Asset
                               Securities Corporation, as depositor, Residential
                               Funding Corporation,  as master servicer, and the
                               U.S. Bank National Association, as trustee.

                        10.2    Assignment and Assumption Agreement, dated as of
                                December 29, 2004, between  Residential  Funding
                                Corporation  and  Residential  Asset  Securities
                                Corporation.



<PAGE>



                                   SIGNATURES

         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
the  registrant  has duly  caused  this report to be signed on its behalf by the
undersigned hereunto duly authorized.


                                RESIDENTIAL ASSET SECURITIES CORPORATION



                                        By:  /s/Benita Bjorgo
                                      Name:  Benita Bjorgo
                                     Title:  Vice President



Dated:  January 14, 2005


<PAGE>

                                  Exhibit Index


Exhibit No.                         Description

10.1    Pooling and  Servicing  Agreement,  dated as of December 1, 2004,  among
        Residential  Asset  Securities  Corporation,  as depositor,  Residential
        Funding  Corporation,   as  master  servicer,  and  U.S.  Bank  National
        Association, as trustee.

10.2    Assignment  and  Assumption  Agreement,  dated as of December  29, 2004,
        between Residential Funding Corporation and Residential Asset Securities
        Corporation.
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{"company-data": {"conformed-name": "RASC Series 2004-KS12 Trust", "cik": "0001312993", "assigned-sic": "6189", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "333-108865-12", "film-number": "05532688"}, "business-address": {"street1": "8400 NORMANDALE LAKE BLVD", "street2": "SUITE 600", "city": "MINNEAPOLIS", "state": "MN", "zip": "55437", "phone": "9528327000"}, "mail-address": {"street1": "8400 NORMANDALE BLVD STE 6", "street2": "8400 NORMANDALE BLVD STE 6", "city": "MINNEAPOLIS", "state": "MN", "zip": "55437"}}
UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT
                       PURSUANT TO SECTION 13 OR 15(D) OF
                       THE SECURITIES EXCHANGE ACT OF 1934

       Date of Report (Date of earliest event reported): January 14, 2005

                    RESIDENTIAL ASSET SECURITIES CORPORATION,
                  on behalf of the RASC Series 2004-KS12 Trust
             (Exact name of registrant as specified in its charter)

           Delaware                    333-108865-12             51-0362653
-------------------------------  -------------------------  -------------------
(State or other jurisdiction of  (Commission File Number)      (IRS Employer
        incorporation)                                      Identification No.)

          8400 Normandale Lake Boulevard, Suite 250
                   Minneapolis, Minnesota                        55437
----------------------------------------------------       --------------------
           (Address of principal executive office)            (Zip Code)

                                 (952) 857-7000
--------------------------------------------------------------------------------
              (Registrant's telephone number, including area code )

                                       N/A
             (Former name or address, if changed since last report)

Check  the  appropriate  box  below  if the  Form  8-K  filing  is  intended  to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

[ ] Written communication  pursuant to Rule 425 under the Securities Act (17 CFR
230.425)

[ ] Soliciting  material  pursuant to Rule 14a-12 under the Exchange Act (17 CFR
240.14a-12)

[ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
Act (17 CFR 240.14d-2(b))

[ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
Act (17 CFR 240.13e-4(c))
INFORMATION TO BE INCLUDED IN THE REPORT

SECTION 8 - OTHER EVENTS.

ITEM 8.01.        OTHER EVENTS.

On December  29,  2004,  Residential  Asset  Securities  Corporation  caused the
issuance and sale of the Residential  Asset  Securities  Corporation Home Equity
Mortgage Asset-Backed Pass-Through Certificates, Series 2004-KS12, pursuant to a
Pooling and Servicing Agreement, dated as of December 1, 2004, among Residential
Asset Securities Corporation, as depositor,  Residential Funding Corporation, as
master  servicer,  and the U.S.  Bank  National  Association,  as  trustee.  The
mortgage loans were sold to Residential Asset Securities Corporation pursuant to
an Assignment and Assumption  Agreement,  dated as of December 29, 2004, between
Residential Funding Corporation and Residential Asset Securities Corporation.

SECTION 9 - FINANCIAL STATEMENTS AND EXHIBITS

ITEM 9.01 (C). EXHIBITS.

         (c)      Exhibits:  The following  execution  copies of Exhibits to the
                  Form S-3  Registration  Statement of the Registrant are hereby
                  filed.

                      10.1     Pooling  and  Servicing  Agreement,  dated  as of
                               December  1,  2004,   among   Residential   Asset
                               Securities Corporation, as depositor, Residential
                               Funding Corporation,  as master servicer, and the
                               U.S. Bank National Association, as trustee.

                        10.2    Assignment and Assumption Agreement, dated as of
                                December 29, 2004, between  Residential  Funding
                                Corporation  and  Residential  Asset  Securities
                                Corporation.
SIGNATURES

         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
the  registrant  has duly  caused  this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                RESIDENTIAL ASSET SECURITIES CORPORATION

                                        By:  /s/Benita Bjorgo
                                      Name:  Benita Bjorgo
                                     Title:  Vice President

Dated:  January 14, 2005
Exhibit Index

Exhibit No.                         Description

10.1    Pooling and  Servicing  Agreement,  dated as of December 1, 2004,  among
        Residential  Asset  Securities  Corporation,  as depositor,  Residential
        Funding  Corporation,   as  master  servicer,  and  U.S.  Bank  National
        Association, as trustee.

10.2    Assignment  and  Assumption  Agreement,  dated as of December  29, 2004,
        between Residential Funding Corporation and Residential Asset Securities
        Corporation.