HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1773

PERIOD COVERED:  0000Z (UTC) 12/05/96 - 0000Z (UTC) 12/06/96

Daily Status Report as of 341/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed S/C/GHRS 6260 (Linear Extent and Ion Condition in =
Lyman-Alpha Cloud: Cycle 5 Observations)

       The High Resolution Spectrograph was used to make spectrographic =
observations between 1215 A0 and 1500 A0 of the QSO Q0107-025A in order =
to study the linear extent and the ion condition in the Lyman-Alpha =
cloud.  The binary QSO system will be searched for any absorption systems =
which may not be in common with the two objects, thus setting the limits =
on the linear size of its clouds.  A wavelength calibration image was =
also taken.  The observations were completed as planned and no anomalies =
were reported. 

   1.2 Completed Two Sets of WF/PC-2 6253 (Pure Parallel Archive Program)

       The WF/PC-2 was used to execute a pure parallel program taking =
ultraviolet observations running concurrently with prime science =
observations.  The intent is to search for extra-galactic sources with =
flux excesses at 3000 A0 and galactic sources with excesses at 1600 A0.  =
The observations were completed as planned, and no problems were reported.=


   1.3 Completed FOS/BL 6913 (FOS Cycle 6: Location of Spectra and =
Wavelength Calibration)

       The Faint Object Spectrograph (Blue Side) was used to make a =
series of stability calibration measurements of the wavelength location =
and the location of the spectra.  All the observations were internals.  =
The observations were completed as planned, and no problems were =
reported.

   1.4 Completed GHRS/2 6599 (Boron in Halo Giants: A Solution to the D+3 =
He Crisis in Big Bang Nucleus)

       The High Resolution Spectrograph (Side Two) was used to make =
spectrographic observations of the boron abundances of giant halo star =
HD63791.  Comparison of the abundances among other stars of the same type =
will allow the investigator to determine whether mass loss or mixing =
causes the low Carbon-12/ Carbon-13 ratios seen in these type stars. Near =
the beginning of this eight-and-a-half-hour proposal, at 340/122224Z, =
during the primary and immediate re-acquisition, the scan steps limit was =
exceeded.  This parameter was back in limits at 340/122311Z.  HSTAR 5827 =
was written.  Then, as described in HSTAR 5528, about an hour before the =
end of the proposal, at 340/175746Z, the GHRS RIU B temperature slightly =
exceeded the 29.0 deg. C limit.  It remained out of limits until =
approximately 340/1933Z.  Otherwise, the observations executed as =
scheduled, and no further problems were reported. 

   1.5 Completed FOS/BL 6781 (Soft X-Rays and the UV Spectra of a =
Complete QSO Sample)

       The Faint Object Spectrograph (Blue Side) was used to obtain =
ultraviolet spectra of the low-Z quasi-stellar object MARK-478.  The =
ionization continuum of this object has been studied using the ROSAT =
satellite.  The strengths and line profiles of strong and weak =
ultraviolet emission and absorption lines and the ultraviolet continuum =
were studied.  The observations were completed as planned and no =
anomalies were reported.

   1.6 Completed FOS/RD 6577 (An Expanded Survey for Study of the =
Lyman-Alpha Line and QSO Mg II Absorption)

       The Faint Object Spectrograph (Red Side) was used to make =
observations of the QSO TB0933+733 in order to make a survey of the =
Lyman-Alpha line and the 68 Mg II absorption line system.  The =
observations were completed as scheduled, and no problems were reported. 




2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 4
                                        Successful : 4

                          Scheduled Reacquisitions : 8
                                        Successful : 8

       At 340/122224Z, during a primary and immediate re-acquisition, the =
scan steps limit was exceeded.  This parameter was back in limits at =
340/122311Z.  HSTAR 5827 was written.

   2.2 FHST Updates: 

                              Scheduled : 11
                             Successful : 11

   2.3 Operations Notes:

       There were no reported operational problems.

3.0 SIGNIFICANT FORTHCOMING EVENTS: 

        Nothing at this time.

/DMH