HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1926

PERIOD COVERED:  0000Z (UTC) 07/23/97 - 0000Z (UTC) 07/24/97

Daily Status Report as of 205/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed STIS/CCD 7659 (Daily Darks to Update Acquisition Bad Pixel
Table)

       The Space Telescope Imaging Spectrograph (CCD) was used to make dark
calibration images in order to update the acquisition bad pixel table.
Daily hot pixel lists can also be used for science data analysis.  The
observations were executed as scheduled, and no anomalies were noted.

   1.2 Completed Three Sets of STIS/MA2 7604 (Cycle 7 MAMA Dark Measurements)

       The Space Telescope Imaging Spectrograph (MA2) was used to make MAMA
dark measurements.  These darks will be used in later image reductions and
also trended over the instrument's life time as an indicator of the
detector's degradation or damage.  The observations were completed as
scheduled, and no problems were reported.

   1.3 Completed WF/PC-2 7621 (WF/PC-2 Cycle 7 Supplemental Darks PT1/3)

       The WF/PC-2 was used to make supplemental dark calibration images.
This set of dark calibrations is intended to obtain three dark frames every
day to provide data for monitoring and characterizing the evolution of hot
pixels.  The observations were executed as scheduled, and no anomalies were
noted.

   1.4 Completed WF/PC-2 6935 (WF/PC-2 Cycle: Photometric Transformation)

       The WF/PC-2 was used to make observations of object NGC-5139 in
order to perform photometric  transformations.  This is a series of
observations that will be used to extend the WF/PC-2 photometric
transformation to include the Stromger and Johnson-Cousins systems.  The
observations were completed as planned and no problems were reported.

   1.5 Completed Three Sets of NIC/1/2/3 7779 (NICMOS One Orbit Parallel -
Camera 3 Focus)

       The Near Infrared Multi-Object Spectrograph (Cameras One, Two and
Three) was used to conduct a one-orbit camera focus test taken in parallel
with the prime science observations.  The tests were completed as
scheduled, and no anomalies were noted.

   1.6 Completed NIC/2 7052 (NICMOS Coronographic Performance Verification)

       The Near Infrared Camera Multi-Object Spectrograph (Camera Two) was
used to make coronographic observations of the standard star BD+032964 in
order to evaluate its performance.  This test measured the diffractive
energy rejection and scattering properties of the NICMOS coronograph and
assess coronographic performance in a small set of selected filters.
Spatial mappings of the achievable local and global source/background
contrast will be determined near the coronographic hole.  The observations
were executed as scheduled, and no anomalies were noted.

   1.7 Completed STIS/CCD 7276 (Synoptic Monitoring of Seasonal Phenomena
on Mars)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
seasonal ultraviolet imaging of the planet Mars.  This season includes the
formation of the north polar cap and hood system, a process which is not
well documented; the start of the classic dust storm season on Mars, when
large dust storms have often occurred; and an active cycle of small dust
storms in Hellas.  These observations will complete a period of continuous
monitoring of Mars which commenced in Cycle 6.  The observations were
completed as planned, and no problems were reported.

   1.8 Completed NIC/1/2 7156 (Revised NICMOS Field Offset Mechanism Test)

       The Near Infrared Camera (Camera One and Two) was used to conduct a
field offset mechanism test bu making observations of SAO34401.  This test
verifies the FOM's mechanical and optical operation.  A dark calibration
observation was also taken.  The observations were completed as planned,
and no problems were reported.

   1.9 Completed 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.

   1.10 Completed FGS 6882 (Companion to GL6230)

       The FGSs were used to make POS and TRANS mode astrometric
observations of star GL623 (aka, Gleise 623) looking for possible
companions.  Five other reference stars were also used.  From these data
the precise parallax, barycentic orbits, and accurate masses of the star
and its companion will be determined.  The observations were completed as
schedule, and no anomalies were reported.

   1.11 Completed Three Sets of STIS/CCD 7675 (STIS Non-Scripted Parallel
Archive Proposal)

       The Space Telescope Imaging Spectrograph (CCD) was used in the
parallel mode to obtain slitless spectroscopy with the G750L grating to
search for emission line galaxies at intermediate to high redshift.  The
observations were completed as planned, and no anomalies were reported.

  1.12 Completed WF/PC-2 6104 (Deep Imaging of Globular Clusters in the
Coma Ellipticals)

       The WF/PC-2 was used to make deep observations of the central
nuclear region in super giant elliptical galaxy NGC-04874, which is located
in the Coma Galactic Cluster, looking for globular clusters.  These data
will allow us to investigate the chemical enrichment history, mass
distribution, and formation efficiency of globular clusters within this
galaxy, and they will extend our study of these phenomena to a much richer
and denser galaxy environment than is accessible from ground-based imaging.
The observations were executed as scheduled, and no anomalies were noted.

   1.13 Completed NIC/3 7780 (NICMOS Short One Orbit Parallel - Camera 3
Focus Test)

       The Near Infrared Camera (Camera Three) was used to conduct a short
one orbit focus test in parallel with the prime science observations.  The
observations were completed as scheduled, and no anomalies were noted.

   1.14 Completed STIS/CCD 7727 (STIS Non-Scripted Parallel Archive Proposal)

       The Space Telescope Imaging Spectrograph (CCD) was used to obtain
parallel slitless spectroscopy with the G750L grating to search for
emission line galaxies at intermediate to high redshift.  Field galaxy
surveys have shown that at high redshift most galaxies have strong emission
lines, and are compact and blue.  The observations were completed as
planned, and no anomalies were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 6
                                        Successful : 6

                          Scheduled Reacquisitions : 9
                                        Successful : 9

   2.2 FHST Updates:

                              Scheduled : 10
                             Successful : 10

   2.3 Operations Notes:

       The SSR Interrupt Log was dumped at 204/1921Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH