HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1716

PERIOD COVERED:  0000Z (UTC) 09/11/96 - 0000Z (UTC) 09/12/96

Daily Status Report as of 256/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed FGS 6874 (Parallaxes of Hyades Cluster Members, Cycle 6 =
- High)

       The FGSs were used to make parallax astrometric observations of =
the stars VA622 and VA627 and several other reference stars within the =
Hyades star cluster, to better define the Population 1 zero age main =
sequence.  The observations were completed as planned, and no problems =
were reported.

   1.2 Completed Four 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 FOC/96 6894 (Cycle 6: Aperture Monitor Location)

       The Faint Object Camera (f/96) was used to make observations of =
selected targets in NGC-188 in order to monitor the location of the =
camera's aperture with respect to the V2-V3 coordinate frame.  The =
observations were completed as planned, and no problems were reported.

   1.4 Completed GHRS/2 6534 (Be-Deficient Halo Stars: Implications For =
Galactic Chemical Evolution)

       The High Resolution Spectrograph (Side Two) was used to make =
observations of the beryllium deficient halo star HD94028 to help study =
the galactic chemical evolution.  The objective is to measure the =
abundance of boron in this star, and compare this with the abundances of =
Be and Li.  The observations were completed as planned, and no problems =
were reported.

   1.5 Completed FOS/RD 6292 (Time Resolve FOS Observations of the AP =
Star HD60435)

       The Faint Object Spectrograph (Red Side) was used to make =
observations of the star HD60435.  During the SV program with the HSP =
this star was found to have previously unknown pulsations.  The =
observations were completed as scheduled, and no anomalies were reported.

   1.6 Completed FOS/RD 6796 (Spectral Mapping of Accretion Disks in =
Cataclysmic Binaries)

       The Faint Object Spectrograph (Red Side) was used to make rapid =
mode spectrographic mapping observations of the accretion disk around the =
cataclysmic binary system V348-Puppis taken during the system's eclipse =
phase.  The observations were completed as planned, and no problems were =
reported.

   1.7 Completed GHRS/2 6644 (Boron Isotope Ratios in Early Stars from B =
III)

       The High Resolution Spectrograph (Side 2) was used to make high =
resolution spectrographic observations of early-type, B class star HD3346 =
in order to determine its B11/B10 isotope ratio.  Knowledge of the B =
ratio will allow new constraints to be placed on theories of B11 =
synthesis.  The observations were completed as planned, and no problems =
were reported.

   1.8 Completed WF/PC-2 6363 (The Environments and Host Galaxies of =
BL-Lac Objects)

       The WF/PC-2 was used to make snapshot survey observations of =
BL-Lac objects MS1258.4+6 and MS0737.9+7 in order to study their =
environment and their host galaxies.  The goal is to investigate =
systematic trends in host galaxy type, unusual morphological features, =
nearby companion galaxies, etc.  The observations were executed as =
scheduled, and no anomalies were noted.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 7
                                        Successful : 7

                          Scheduled Reacquisitions : 5
                                        Successful : 5

   2.2 FHST Updates: 

                              Scheduled : 12
                             Successful : 12

   2.3 Operations Notes: 

       There were no reported operational problems.

       HST operations transferred to the SAMS backup facility in =
preparation for today's simulation activities at approximately 256/0200Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS: 

        GSFC Internal Simulation #10 (EVA 2) is scheduled today from =
approximately 8:00 a.m. until approximately 6:00 p.m.

/DMH