HUBBLE SPACE TELESCOPE
                               DAILY REPORT #840

PERIOD COVERED:  0800 EST
Daily Status Report as of 069/1200Z.

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Uplinked Updated Ephemeris Tables, Per MOSES 2871

   1.2 Completed PC 3769 (Structure of Inner Coma of Comet Chiron)

       The Planetary Camera was used with filter F555W to make four
       observations of the comet/object 2060 Chiron. This is to find its
       outer edge (i.e., the exopause) of the gravitationally bound dust
       cloud around the nucleus (i.e., the inner coma), and also to look
       for indications of active regions in the inner coma. All four
       observations were received and displayed in the OSS. They were
       reported to look okay. 

   1.3 Completed WFC/PC 4109 (WF/PC Calibration: Rapid Internal Monitor)

       Both the wide Field Camera and the Planetary Camera were used with
       filter F555W to make internal flat observations to check for new
       forms of contamination (i.e. daisies and measles). Both internal 
       flat observations were reported to look normal. 

   1.4 Completed HSP/POL 3557 (Polarimetric Observations of Crab Pulsar in 
       the UV)

       Because of the fact that the High speed Photometer had been placed
       in safe mode (064/2344Z), the four planned observations of the Crab
       Nebula Pulsar did not occur. (See Operations Note 2.4)

   1.5 Completed WFC 1306 (GTO Low Latitude Parallel Program)

       The Wide Field Camera was used to make two low latitude observations
       taken in parallel with the prime science observations. Both
       observations were received and displayed. They both were reported to
       look okay. 

   1.6 Completed S/C/FOS/BL/RD 4098 (FOS Discriminator Test)

       The Faint Object Spectrograph was used to make one spectral
       calibration observation of determine to optimal diode discriminator
       settings. The observations was received and displayed. It was
       reported to look normal. 

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 2
                                        Successful : 2
                          Scheduled Reacquisitions : 11
                                        Successful : 11
                                    Losses of Lock : 1

                          (LOL AT 069/0129Z, HSTAR 3909)

   2.2 FHST Updates: 

                              Scheduled : 6
                             Successful : 6

   2.3 Significant HSTARs: None

   2.4 Operations Note: 

   2.4 Operations Note: 

       On Monday (Day 067) while the High Speed Photometer was being used
       to make polarimetric observations of the Crab nebula pulsar the
       Science Data Formatter (SDF) unit locked up. The SDF lock up 
       occurred because of improper handshaking between the NSSC-I and the
       SDF. The HSP was disabled to enable other SI observations to
       continue. Shortly afterwards, due to concerns over the vulnerability
       of the HSP to bright objects, the HSP was safed. The command plan is
       currently being modified to allow the HSP observations to resume as
       soon as is possible. 

3.0 ACTIVITIES SCHEDULED FOR NEXT REPORTING PERIOD:

   3.1 Complete FOS/BL 3538 ( UV spectra of Extended Emission Regions 
       Around QSOs)

   3.2 Complete Two Sets of S/C/FOS/BL 4099 (FOS focus, X-Pitch and
       Y-Pitch) 

   3.3 Complete FOC/96 4800 (Stellar content of Wolf-Rayet Galaxies)

   3.4 Complete WFC 4658 (Determination of Extragalactic Distance Scale)

   3.5 Complete GHRS/2 3626 (Ephemeral Determination fo wind Velocities and 
       Density Laws)

   3.6 Complete PC 4140 (WF/PC Calibration: Rapid Internal Monitor Part 2)

   3.7 Complete Uplink Updated Ephemeris Tables, Per MOSES 2871

   3.8 Complete GHRS/2 3496 (Ultraviolet Atlas of Sirius)

   3.9 Initiate FOC/96 3591 (Massive Stars in Starburst galaxies - FOC 
       images)

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.

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