HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1925

PERIOD COVERED:  0000Z (UTC) 07/22/97 - 0000Z (UTC) 07/23/97

Daily Status Report as of 204/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:


   1.1 Completed Two Sets of 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.

   1.2 Completed FGS 6479 (Masses of Low Luminosity Hyades Cluster Members)

       The FGSs were used to make astrometric observations of low
luminocity star VA351 which is a member to the Hyades Cluster.  This
cluster, owing to its nearness, richness, and young age, occupies a pivotal
role in the studies of star formation and stellar populations.  The
observations were executed as planned, and no anomalies were reported.

   1.3 Completed WF/PC-2 6569 (The Physics of Nearby Blue Irregular Starbursts)

       The WF/PC-2 was used to make observations of nearby dwarf galaxy
NGC-4214 in order to study the physics of its blue irregular starburst
regions by obtaining ultraviolet, violet, red, and infrared and narrow band
H Alpha and O III images.  The observations were executed as scheduled, and
no anomalies were noted.

   1.4 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.

   1.5 Completed Two Sets of WF/PC-2 6837 (The Ultraviolet Properties of
"Dwarf" Seyfert 1 Nuclei)

       The WF/PC-2 was used to make ultraviolet observations of the
"dwarf", type one, Seyfert galaxies NGC-5077 and NGC-4258.  This class of
"dwarf" Seyfert populate the faint end of the local AGN luminosity function
and hold important clues to the evolution of the entire AGN population.
The observations were completed as scheduled, and no problems were
reported.

   1.6 Completed Two Sets of 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 which was conducted in parallel with the prime science
observations.  The observations were completed as scheduled, and no
anomalies were noted.

   1.7 Completed WF/PC-2 6902 (WF/PC-2 Cycle 6 Photometric Calibration
Monitor UV/OPT STD)

       The WF/PC-2 was used to make both ultraviolet and optical
photometric observations of the standard star GRW+70D582 as part of a Cycle
6 calibration procedure.  These observations were done immediately before
and after decontamination procedures.  The observations were completed as
planned, and no problems were reported.

   1.8 Completed Two Sets of STIS/CCD 7635 (STIS CCD Hot Pixel Annealing)

       The Space Telescope Imaging Spectrograph (CCD) was used to test the
hot pixel annealing procedure.  The effectiveness of the CCD hot pixel
annealing process is assessed by measuring the dark current behavior before
and
after annealing and by searching for any window contamination effects.  The
observations were completed as planned, and no problems were reported.

   1.9 Completed WF/PC-2 6774 (Temporal Variability in Io's Surface and Plumes)

       The WF/PC-2 was used to make observations of Jupiter's moon Io at a
longitude of 160 degrees in order to study temporal variability in its
plums and surface markings.  The longitude was chosen such that a known
volcano will be present at Io's limb.  The observations were executed as
scheduled, and no anomalies were noted.

   1.10 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.

   1.11 Completed WF/PC-2 7618 (WF/PC-2 Cycle 7 Photometric Monitor UV/OPT STD)

       The WF/PC-2 was used to make observations of the standard star
GRW+70D582 as part of a Cycle 7 photometric monitoring program.  This
ultraviolet spectrophotometric standard star was observed in a variety of
filters and cameras to monitor the photometric stability and quantum
efficiency of WF/PC-2 from the far-ultraviolet to near-infrared.  The
observations were completed as scheduled, and no problems were reported.

   1.12 Completed Three Sets of STIS/MA1/MA2 7604 (Cycle 7 MAMA Dark
Measurements)

       The Space Telescope Imaging Spectrograph (MA1 and 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.

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

       The Near Infrared Camera Multi-Object Spectrograph was used to make
coronographic observations of the standard star FHDR-BLAND-1 in order to
evaluate its performance.  This test measures 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
rations will be determined near the coronographic hole.  The observations
were executed as scheduled, and no anomalies were noted.

   1.14 Completed WF/PC-2 6678 (Nearby Young Dwarf Galaxies and Their Lyman
Alpha Emissions)

       The WF/PC-2 was used to make observations of the young, metal
deficient, blue, compact, dwarf galaxy TOL65 in order to study its Lyman
Alpha emissions.  The observations were completed as planned, and no
problems were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 9
                                        Successful : 9

                          Scheduled Reacquisitions : 5
                                        Successful : 5

   2.2 FHST Updates:

                              Scheduled : 19
                             Successful : 19

   2.3 Operations Notes:

       The SSR Interrupt Log was dumped at 203/2026Z.

       The STIS Bad Pixel Table was uplinked at 203/2045Z.

       The NICMOS Coronographic Hole Position was updated at 204/0231Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH