HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1547

PERIOD COVERED:  0000Z (UTC) 01/04/96 - 0000Z (UTC) 01/05/96

Daily Status Report as of 005/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Two Sets of GHRS/1 6171 (CRIMP1: Cycle 5 =
Condensed-Regimen Integrated Monitoring Program)

       The High Resolution Spectrograph (Side One) was used  to obtain =
darks, internal flats (in photoscan mode), wavelength calibrations and =
observations of standard star BD+28D4211.  This includes detector =
calibration, sensitivity monitoring, and wavelength monitoring.  During =
the first iteration, a status buffer error message occurred at 004/025944Z =
that told of a coarse Y-null balance failure.  HSTAR 5426 was written.  =
Otherwise, the observations were executed as scheduled, and no further =
anomalies were noted. 

   1.2 Completed GHRS/1 6070 (Interstellar Tin: Probing Galactic S-Process =
Element Enrichment)

       The High Resolution Spectrograph (Side One) was used to make =
Echelle A observations of star HD38771 in order to probe for interstellar =
tin and to study the galactic S-process neutron capture of element =
enrichment.  The observations were completed as planned, and no problems =
were reported.

   1.3 Completed WF/PC-2 5935 (Gravitational Imaging in Well-Constrained =
Clusters)

       The WF/PC-2 was used to study gravitational lensed systems located =
in the well constrained galactic cluster AC114-POS1.  The objective is to =
study the distribution of mass within the cluster, and to determine =
distances to the faint background galaxy.  As described in HSTAR 5427, the =
guide star acquisition for this proposal failed fo fine lock on FGS #3 =
only.  Except for this occurrence, the observations were completed as =
planned, and no other anomalies were reported.

   1.4 Completed WF/PC-2 6099 (Black Holes and Cores of Galaxies)

       The WF/PC-2 was used to search for a possible black hole in the =
core of nearby early-typr galaxy NGC-821.  The WF/PC-2 will be used to =
obtain high resolution images of this galaxy to identify and study its =
bright core, and to provide sufficiently accurate coordinates for the FOS, =
which will be used to measure the velocity dispersion.  The observations =
were executed as scheduled, and no anomalies were noted.

   1.5 Completed WF/PC-2 5972 (Determination of the Extragalactic Distance =
Scale)

       The WF/PC-2 was used to make observations of the galaxy NGC-3198 =
looking for standard candle Cepheid variable stars.  The purpose of these =
observations is to help estimate the Hubble constant with an accuracy of =
10%.  The observations were executed as scheduled, and no anomalies were =
noted.

   1.6 Completed WF/PC-2 5974 (The Evolution of Radio Loud Quasars)

       The WF/PC-2 was used to make observations of the radio loud large =
redshift quasar MRC1244-25.  The purpose is to determine if this galaxy is =
from the same parent population as other kinds of radio galaxies already =
studied using HST.  The observations were completed as scheduled, and no =
problems were reported.

   1.7 Completed WF/PC-2 6303 (Observations of Galaxies Underlying =
Quasars)

       The WF/PC-2 was used to make observations of low red shift quasar =
PG1358+04 in order to study its underlying galaxy.  The purpose is to =
detect structure down to the 0.1 arcsecond level.  The observations were =
completed as planned, and no problems were reported.



2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 8
                                        Successful : 8

                          Scheduled Reacquisitions : 9
                                        Successful : 9

   2.2 FHST Updates: 

                              Scheduled : 16
                             Successful : 16

   2.3 Operations Notes: 

       As reported previously, the exceeding of operationally set =
temperature limits continues to be the case for many parameters.  This is =
normal for this time of the year.  However, to ensure that these =
violations do not represent health and safety issues, each occurrence is =
written up in individual HSTARs.

       The parallel checkout of PRS 8.1 TTAC software continues with no =
problems being reported.

3.0 SIGNIFICANT FORTHCOMING EVENTS: 

        Nothing at this time.

/DMH