HUBBLE SPACE TELESCOPE
                               DAILY REPORT #1173

PERIOD COVERED:  0700 EST
Daily Status Report as of 186/1200Z.

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed WF/PC-2 WF/PC-2 5560 (Cycle 4 Calibration: Internal
       Monitor. 1)

       The WF/PC-2 was used to make several internal bias, K-Spot, and flat
       calibration observations to monitor the CCD camera electronics, the
       optical alignment, and to check for contamination. A total of ten
       images was taken. They all were reported to look okay, although one
       observation showed a bias jump.

   1.2 Completed FOC/96 5330 (High Resolution Mapping of Pluto's Albedo
       Distribution)

       The Faint Object Camera was used to make observations of the planet
       Pluto and its moon Charon in two bandpasses. Six images were
       received and displayed in the OSS. They were reported to be nominal.
       No anomalies were noted.

   1.3 Completed Three Sets of WF/PC-2 5479 (Subarcsecond Structure in
       Nearby AGNs)

       The WF/PC-2 was used to make snapshot observations of the nearby
       active galactic nuclei of ESO362-G8, F334, and MARK530. The
       observations were executed as scheduled, and no anomalies were
       noted. The first observations was received and displayed. It was
       reported to be okay. The next two observations were executed as
       scheduled, and no anomalies were noted.

   1.4 Completed Two Sets of FOS/BL and WF/PC-2 5494 (Stellar Winds of
       Massive Stars in Nearby Galaxies)

       The WF/PC-2 and the Faint Object spectrograph (Blue Side) were used
       to make observations of two bright stars OB76-5, and OB21-1 in
       galaxy M-33. The observations were executed as scheduled. In the
       first set of observations three images were reported to be blank
       because the onboard target acquisition failed. The parallel WF/PC-2
       observation was reported to look okay, but the pointing may not have
       been precisely correct. In the second set of observations eight
       science observations were received and displayed. They all were
       reported to look okay.

   1.5 Completed  FGS 5174 (Astrometric Companion Search: Cycle 4)

       FGS #3 was used to make astrometric observations of the possible
       binary dwarf star W1062 to look for an astrometric unseen low mass
       companion. The OSS monitored the observations and assessed the data
       quality. No anomalies were noted.

   1.6 Completed FOC/96 5301 (Structure and Populations of Globular
       Clusters)

       The Faint Object Camera (f/96) was used to make observations of the
       large globular cluster NGC-5139 to make images of its core and two
       fields farther from the center. The observations were executed as
       scheduled, and no anomalies were noted.

   1.7 Completed Six Sets of WF/PC-2 5446 (The Nuclei of Nearby S0 and
       Spiral Galaxies)


       The WF/PC-2 was used to make observations of galaxies NGC-5068,
       NGC-4654, NGC-660, NGC-3344, NGC-3556, NGC-3432, NGC-3507, and
       NGC-4218 . The observations were executed as scheduled. Several
       observations were received and displayed. They were reported to look
       okay. Several other observations still remain on Science Tape
       recorder #1, and will be analyzed later. No anomalies were noted.

   1.8 Completed Two Set of WF/PC-2 5476 (Continuum Snapshots of 3CR Radio
       Galaxies)

       The WF/PC-2 was used to make snapshot images of radio galaxies
       3C89.0 and 3C394.0 as part of a continuum survey and to study the
       galaxies' morphology. The observations were executed as scheduled,
       and no anomalies were noted.

   1.9 Completed FOS/RD 5539 (Cycle 4 FOS Photometric Monitor)

       The Faint Object Spectrograph (Red Side) used standard star
       BD+28D4211 to calibrate the absolute sensitivity of its detectors.
       The observations were received and displayed. They were reported to
       look okay. No anomalies were noted.

   1.10 Completed Two Sets of WF/PC-2 5570 (WF/PC-2 Cycle 4 Calibration:
       Earthflats, Large Set)

       The WF/PC-2 was used to make a set of Earth flat calibration images
       using different filters in order to construct high quality flat
       fields of the OTA illumination pattern. A total of eight images was
       received and displayed. Six observations were reported to be
       saturated, one showed a bias jump, and one was okay.

   1.11 Completed Two Sets of WF/PC-2 5369 (HST Medium Deep Survey: Cycle 4
       Medium, High Galactic Latitude)

       The WF/PC-2 made a series of observations of high latitude objects
       as part of a medium deep sky survey. The observations were taken in
       parallel with other prime science observations. Five observations in
       the first set, and two observations in the second set, were received
       and displayed. They all were reported to be okay.

   1.12 Completed WF/PC-2 5427 (Calibration of Nearby Galaxy Type IA
        Supernovae as Standard Candles)

       The WF/PC-2 was used to make observations of nearby galaxies
       NGC-4536-FI and NGC-4496-A-F as part of an effort to find Cepheids
       in these galaxies which have produced a Type I supernova. The
       observations were executed as scheduled. Two observations were
       received and displayed. They were reported to look okay. No
       anomalies were noted.

   1.13 Completed WF/PC-2 5629 (WF/PC-2 Cycle 4 Photometric Calibration
        Monitor 1C: 4-Chip STD in F170W)

       The WF/PC-2 was used to make photometric calibration observations of
       the ultraviolet standard star GRW+70D582. The observations were
       executed as scheduled, and no anomalies were noted.

   1.14 Completed Two Sets of GHRS/2 5600 (GHRS Side 2 Wavelength Monitor
       (1ST Order Gratings): Cycle 4)

       The High Resolution Spectrograph (Side Two) was used to make
       wavelength and resolution calibration observations of its first
       order gratings using the internal calibration lamp. Six observations
       were received and displayed. They were reported to be okay.

   1.15 Completed FGS 4884 (High Speed Astrometry A Search for Planetary
       Companions to Low Mass Stars)

       The FGSs were used to make observations of Barnard's star to look
       for astrometric companions (i.e., a Jupiter-sized companion). The
       astrometry observations were monitored, and no problems were seen in
       the telemetry.

   1.16 Completed WF/PC-2 5092 (GTO Low Latitude Parallel Program: Cycle 4)

       The WF/PC-2 was used to make observations taken in parallel with the
       prime science observations. This is part of a survey to take
       pictures of a large number of fields within 30 degrees of the
       galactic plane. Two images were received as scheduled, and they were
       reported to look okay.

   1.17 Completed Three Sets of WF/PC-2 5655 (WF/PC-2 Cycle 4
       Calibration: Internal Monitor. 2 :Flats Part 2)

        The WF/PC-2 was used to make both dark and visual flats. The
        observations were executed as scheduled, and no anomalies were
        noted.

   1.18 Completed WF/PC-2 5662 (Cycle 4 DD HST Observations of Comet
       Shoemaker-Levy (1993E) for July 1)

       The WF/PC-2 was used to make images of the comet Shoemaker-Levy 9 to
       help refine the size estimates of the various components of the
       comet train. The observations were executed as scheduled, and the
       science observations remains on Science Tape Recorder #1. It will be
       analyzed later. No anomalies were noted.

   1.19 Completed FOS/BL 5660 (Search for Evidence of Active Ice Volcanism
       of Europa: Cycle 3 High)

       The Faint Object Spectrograph (Blue Side) was used to make
       spectrographic observations of the limb of Jupiter's moon Europa to
       look for OH emissions. The observations were executed as scheduled,
       and the data remains on Science Tape Recorder #1. It will be
       analyzed later. No anomalies were noted.

   1.20 Completed Three Sets of WF/PC-2 5562 (WF/PC-2 Cycle 4
       Calibration: Internal Monitor 3: Darks)

       The WF/PC-2 was used to obtain several 30-minute long, dark
       exposures to provide ongoing calibration of the CCD dark current and
       to monitor and characterize the evolution of hot pixels. The
       observations were executed as scheduled, and the science data still
       remains on Science Tape Recorder #1. It will be analyzed later. No
       anomalies were noted.

   1.21 Completed WF/PC-2 5378 (Morphological Evolution of Galaxies in
       Clusters at Z=0.5)

       The WF/PC-2 was used to make observations of galaxy GAL-CLUS-1 to
       study its morphology. The observations were executed as scheduled,
       and no anomalies were noted.

   1.22 Completed WF/PC-2 5563 (WF/PC-2 Cycle 4 Photometric Calibration
        Monitor 1: UV/Opt STD)

       The WF/PC-2 was used to make photometric calibration images of
       ultraviolet standard star GRW+70D582 and monitor the photometric
       stability and quantum efficiency of the WF/PC-2. The observations
       were executed as scheduled, and no anomalies were noted.

   1.23 Completed WF/PC-2 5447 (The Nature of Primeval Galaxies)

       The WF/PC-2 was used to make deep polarization observations of the
       distant, massive galaxy MGO406-244 to look for molecular gas, dust,
       and star formation. The observations were executed as scheduled, and
       no anomalies were noted.

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions:


                            Scheduled Acquisitions : 20
                                        Successful : 20
                          Scheduled Reacquisitions : 34
                                        Successful : 34

   2.2 FHST Updates:

                              Scheduled :63
                             Successful :63

   2.3 Significant HSTARs:

       See Item 2.4 .

   2.4 Operations Notes:

       HST operations proceeded nominally throughout the weekend until
       186/0524Z, when there was a negative acquisition of HST telemetry.
       After operations switched to the low gain antennas, data was
       re-acquired at 0538Z. The DF-224 was executing erratically.  A full
       DF-224 memory dump was executed, and that dump is undergoing
       analysis. No conditional processor (CP) commands were issued by the
       DF-224 after 050541Z.  Operations personnel commanded the HST to the
       inertial hold mode at approximately 186/0856Z.

       Analysis of the incident via the DF-224 dump is continuing.
       Currently, the cause of the anomaly is unknown.  The ZOE engineering
       tape recorder dump is expected to be received at approximately 2000Z
       this afternoon, and may contain valuable information.  The plan is
       to remain in inertial hold until the nature of the problem
       encountered is understood.

3.0 ANOMALY STATUS:

   3.1 Significant New Anomalies: None

   3.2 Significant Unresolved Anomalies: None

4.0 SIGNIFICANT FORTHCOMING EVENTS:

       Nothing at this time.

/DMH                           -END-