HUBBLE SPACE TELESCOPE
                               DAILY REPORT #936

PERIOD COVERED:  0800 EST
Daily Status Report as of 207/1200Z.

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Three Sets of PC 4809 (Cycle 2: WF/PC PSF Calibration
       Proposal) 

       The Planetary Camera was used to make a point spread function
       calibration image of standard star HD151406. The OSS monitored the
       observation and assessed the data quality. No problems were
       reported. 

   1.2 Completed FGS 2565 (Linking the HIPPARCOS to the Extragalactic 
       Reference Frame Part 1 of 6)

       The Fine Guidance Sensors were used to make two sets of astrometric
       observations of objects 0109+224 and object 142REF. These objects
       lie near the apparent position of extragalactic objects. These
       objects will also be observed with the HIPPARCOS satellite. The
       intent is to tie the HIPPARCOS system reference frame to the
       extragalactic reference frame. The observations were executed as
       scheduled, and no problems were reported. 

   1.3 Completed Two Sets of FOS/RD 4953 (QSO Absorption System Snapshot 
       Survey - Part 3 of 3: Cycle 3 High)

       The Faint Object Spectrograph was used to make observations of
       quasar 1612+2611 to look for absorption lines at low redshift, and
       also emission lines in the QSO's continuum. The observations were
       executed as scheduled, and all the observations were reported to be
       okay. 

   1.4 Completed Four Sets of WFC 4713 (WF/PC Cycle 2 Calibration: WFC 
       Internal Deltas Flats)

       The Wide Field Camera was used to make a total of four internal flat
       calibrations images. All four images were reported to be normal. 

   1.5 Completed GHRS/2 5012 (Physical and Chemical Processes in Dense 
       Interstellar Clouds)

       The High Resolution Spectrograph was used to make observations of
       star HD154368. This target star is behind a translucent interstellar
       cloud which is dense enough for the formation of molecules, but
       still passes some star light. The proposers are interested in the
       absorption lines in the stellar spectrum. The observations were
       complete as planned, and no problems were reported. 

   1.6 Completed Two Sets of GHRS/2 3941 (Physical Parameters in the Local 
       Interstellar Medium - Cycle 2)

       The High Resolution Spectrograph was used to make observations of
       the star HD209952 (aka, Alpha Gruis) to observe the weak lines from
       neutral atomic species in the local interstellar medium. The
       baseline guide star acquisition made fine lock (2 star!). The
       on-board spiral target acquisition located the target on the third
       map. The resulting spectral observations showed plenty of signal.
       There is apparently a new dead diode in channel 471. 

   1.7 Completed Two Sets of WFC 5013 (WF/PC Cycle 3 Calibration: WFC
       Narrow. 2) 

       The Wide Field Camera was used to make Earth flat calibration images
       to be used for flat fielding of WFC observations. The observations
       used the narrow band filters, both with and without neutral density
       filters. The observations were all received. No problems were 
       reported.

   1.8 Completed Eight Sets of PC 4714 (WF/PC Cycle 2 Calibration: PC 
       Internal Delta Flats)

       The Faint Object Camera was used to make two internal flat
       calibration images which will be used for the restoration of Earth
       flat images, which were altered due to changes in quantum efficiency
       which occurred after decontamination operations. Both observations
       were received and displayed in the OSS. They were reported to look
       okay. 

   1.9 Completed FOC/96 3870 (Imaging of M-31 Group Galaxies - Cycle 2)

       The Faint Object Camera (f/96) was used to make seven images of the
       object NGC-224 which is located near galaxy M-31 (The Andromeda
       Galaxy) to determine the population and gradients of this object.
       The observations were executed in fine lock. The images were
       received and displayed, and no problems were reported. 

   1.10 Uplinked Updated Ephemeris Tables, Per MOSES 2871

   1.11 Completed FGS 5068 (Linking the HIPPARCOS to the Extragalactic 
       Reference Frame Part 6 of 6)

       The Fine Guidance Sensor #3 was  used to make two sets of
       astrometric observations of object NEWEGOD-62. This object lies near
       the apparent position of extragalactic objects. This object will
       also be observed with the HIPPARCOS satellite. The intent is to tie
       the HIPPARCOS system reference frame to the extragalactic reference
       frame. The observations were executed as scheduled, But there was a
       problem with the astrometry. Whenever FGS #3 looked at the target
       NEWEGOD-62 the stop flag, and the scan step limit exceeded flag went
       out of limits. 

   1.12 Completed FOS /BL 4328 (The Companions of Dwarf Carbon Stars: Cycle
        3 Medium) 

       The Faint Object Spectrograph was used to make spectral observations
       of the dwarf carbon star LHS1075 which is suspected of having a cool
       white dwarf companion. There were no mechanical or software problems
       with the peakups. However, the counts were very low, and nearly
       uniform in each group. The target is either too faint for the
       exposure time used, or it is nowhere near the field of view. 

   1.13 Completed Two Sets of FOC/96 4804 (UV Imaging of Nearby Galaxies 
        with FOC/96)

       The Faint Object Camera was used to complete two sets of snapshot
       ultraviolet observations fo the nearby galaxy ESO-2312-4 and galaxy
       ESO-1115-3. The exposures lasted for ten minutes and used filter
       F220W. Both sets of observations were reported to be fine. 

   1.14 Completed GHRS/2 3935 (Sulfur Near IO - Cycle 2)

       The High Resolution Spectrograph was used to make a series of
       spectral observations of Jupiter's moon Io while it was both inside
       and outside of the plasma torus. This is to determine the mechanism
       which feeds sulfur and oxygen into the torus. The onboard target
       acquisition was successful. All observations were reported to look
       okay, although they were rather weak. 

   1.15 Completed FOC/96 4800 (The Stellar Content of Wolf- Rayet Galaxies 
        (FOC Images))


       The Faint Object Camera was used to make one spectral observations
       of the Wolf-Rayet galaxy TOL-89. This galaxy is a star bursting
       galaxy which exhibits broad He II emissions at 4686 A0 from stellar
       sources. The observation was received and displayed. No anomalies
       were noted. 

   1.16 Unscheduled Safemode Entry

       The HST entered software sunpoint safemode at approximately 03:24
       A.M. EDT Monday 26, 1993. (See details in Operations Note 2.4).

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 19
                                        Successful : 19
                          Scheduled Reacquisitions : 18
                                        Successful : 18
                                    Losses of Lock : 0

   2.2 FHST Updates: 

                              Scheduled : 38
                             Successful : 38

   2.3 Significant HSTARs: None

   2.4 Operations Note: 

SOFTWARE SUNPOINT SAFEMODE
-------------------------

       The HST entered software sunpoint safemode at approximately 03:24
       A.M. EDT Monday 26, 1993. The Spacecraft on-board computer detected
       a difference between the expected and actual values for the solar
       array wings during a scheduled wing maneuver of 30 degrees. The
       present limit for difference is 8.0 degrees and the safemode was
       activated when this limit was exceeded by the -V2 wing. A previous
       solar array slew of 30 degrees approximately 24 hours earlier had
       executed normally. Initial analysis indicates a nominal safemode
       entry with all subsystems in a safe state. The payload went to the
       expected "soft safing" condition. The vehicle is power positive and
       under nominal safemode ground control by STOCC controllers. 

       Data relevant to the safemode entry is on the on-board tape recorder
       since the event occurred during a ZOE. The earliest time this data
       can be dumped to a ground station is about 5:15 P.M. toady. The data
       will be dumped to Madrid and then forwarded to GSFC. Data analysis
       will begin as soon as the data is available at GSFC. Representatives
       from ESA are at GSFC and are supporting the investigation. 

       Steps are under way to get the spacecraft operational on a Health
       and Safety Load to provide more positive and efficient ground
       operations control, and to facilitate the return to science
       operations when the problem is better understood and resolved. The
       H&S load will be developed today and is expected to start executing
       later tonight. Plans for returning to science operations, currently
       on hold, will be developed after the problem is better understood. 

3.0 ACTIVITIES SCHEDULED FOR NEXT REPORTING PERIOD:

   3.1 Complete WFC 4599 (Optical Morphology of Radio Quiet, Cluster 
       Galaxies at Redshift Z = 3.4)

   3.2 Complete FOS/BL 5050 (Cycle 3 Internal Wavelenght Calibration)

   3.3 Complete Two Sets of WFC 5013 (WF/PC Cycle 3 Calibration: WFC Flats 
       Narrow. 2)

   3.4 Uplink Updated Ephemeris Tables ()

   3.5 Complete FOS/RD 4772 (Black Holes, Stellar Dynamics and Populations 
       in the Nuclei)

   3.6 Complete WFC 4929 (WF/PC Cycle 2: Improved Dark Calibration)

4.0 ANOMALY STATUS:
	
   4.1 Significant New Anomalies: None

   4.2 Significant Unresolved Anomalies: None
 
5.0 SIGNIFICANT FORTHCOMING EVENTS: Nothing at this time.

                            -END-