HUBBLE SPACE TELESCOPE
                               DAILY REPORT #943

PERIOD COVERED:  0800 EST
Daily Status Report as of 216/1200Z.

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed FOS/BL 5052 (FOS Cycle 3 Focus, X pitch, and Y pitch)

       The Faint Object Spectrograph (Blue Side) was used to make seven
       calibration observations as part of a focus and a X and Y pitch
       test. All seven observations were received and displayed in the OSS.
       They were reported to look okay. 

   1.2 Completed Two Sets of FGS 4893 (Orbital Motions of Close Binary
       Stars Cycle 3 High) 

       Fine Guidance Sensor #3 was used to make astrometric observations of
       the binary star system HD163840 to obtain its orbital elements.
       These observations are important since most of the estimates of
       stellar mass are made by observing elements of these systems. The
       observations occurred during a LOS, and the OSS was not able to
       monitor the observations. The data will be analyzed later after a
       science tape recorder playback. 

   1.3 Completed FGS 4892 (Duplicity Among Hyades Stars Cycle 3 High) 

       The FGSs were used to make astrometric observations of the possible
       binary star VA119 which is located in the Hyades open cluster. The
       OSS monitored the observation, and no anomalies were reported. 

   1.4 Completed FOS/BL 3862 (The Excitation of the Atmosphere of Planetary 
       Satellites) 

       The Faint Object Spectrograph was used to attempt to make spectral
       observations of Jupiter's moon Io as it egresses from the planet's
       shadow. The baseline guide star acquisition failed (Search Radius
       Exceeded). The decision observation did not execute. The real-time
       uplink was canceled, because there was no decision observation
       available to calculated a maneuver. The PCS uplinked an ARU/PRT, and
       the reacquisition was partially successful, making course track
       (Fine Lock was requested). (See Operations Note 2.4) The subsequent
       observations completed, although guiding was done using single star
       course track rather then fine lock. Weak spectra were seen in the
       next two observations, but there was no clear evidence that the moon
       IO was in the aperture. 

   1.5 Uplinked Updated Ephemeris Tables, Per MOSES 2871

   1.6 Completed FOS/RD/BL 4976 (UV Rotation Light Curves for Pluto,and 
       Charon's UV Spectrum - Split)

       The Faint object Spectrograph was used to make a TALED exposure
       and subsequent other spectral observations of the planet Pluto and
       its moon Charon. The TALED observation was received in real time and
       displayed. This TALED pseudo image of the science aperture was well
       exposed. After a corrective SIP maneuver was uplinked to the
       spacecraft, spectral observations were made of the planet Pluto. The
       observations were executed in fine lock. The spectral observations
       were received and displayed for the GO, and hard copies were made. 

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 5
                                        Successful : 4

                            Failed Guide star acquisition at 216/0056Z.
                            An ARU/PRT was successfully uplinked.
                            Reacquisition was successful in Course Track.
                            (See Note 1.4)
                      
                          Scheduled Reacquisitions : 7
                                        Successful : 7
                                    Losses of Lock : 1

                            Momentary Loss of Lock at 216/0508 with FGS 1.
                            Reacquisition was successful.

   2.2 FHST Updates: 

                              Scheduled : 0
                             Successful : 0

   2.3 Significant HSTARs: None

   2.4 Operations Note: 

       The SMGT 11 Session 3 test was completed today (WEDNESDAY, Aug. 4),
       and the testing period for tomorrow Thursday (217/2000Z - 218/0400Z)
       will not be needed. 

3.0 ACTIVITIES SCHEDULED FOR NEXT REPORTING PERIOD:

   3.1 Complete WFC/PC 4109 (WF/PC Cycle 2 Calibration: Rapid Internal 
       Monitor)

   3.2 Complete PC 4140 (WF/PC Cycle 2 Calibration: Rapid Internal Monitor  
       - Part 2)

   3.3 Uplink Updated Ephemeris Tables, Per MOSES 2871

   3.4 Complete Two Sets of 4292 (Determination of the Masses and Densities 
       of Pluto and Charon - Cycle 3)

   3.5 Complete WFC/PC 4739 (WF/PC Cycle 2 Calibration: Single Chip UV 
       Calibration)

   3.6 Complete PC 4738(WF/PC Cycle 2 Calibration: UV Flats 1)

   3.7 Complete PC 5014 (WF/PC Cycle 3 Calibration: PC Flats Narrow. 2)

   3.8 Complete GHRS/2 3845 (Deciphering the UV Emission Lines in T Tauri 
       Systems)

   3.9 Complete WFC 5013 (WF/PC Cycle 3 Calibration: WFC Flats Narrow. 2)

   3.10 Complete FGS 5067 (Orbital Parameters of Known Binary, Sequel - Fixed)

   3.11 Complete HSP/POL 1097 (X-Ray Binaries Part 2 - Cycle 2 High)

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.