HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1917

PERIOD COVERED:  0000Z (UTC) 07/10/97 - 0000Z (UTC) 07/11/97

Daily Status Report as of 192/0000Z

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 WF/PC-2 7276 (Synoptic Monitoring of Seasonal Phenomena on
Mars)

       The WF/PC-2 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.

   1.3 Completed Five Sets of STIS/CCD 7601 (CCD Dark and Bias Monitor)

       The Space Telescope Imaging Spectrograph (CCD) was used to conduct
bias and dark monitoring.  Also, observations were made to track the growth
of hot pixels on the CCD in general and within the various target
acquisition apertures specifically.  As first mentioned in yesterday's
report, two FHST updates failed immediately before the first iteration of
this proposal began.  There was no reported effect on these observations.
Otherwise, the other observations were completed as planned, and no
anomalies were reported.

   1.4 Completed Three Sets 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.

   1.5 Completed WF/PC-2 6437 (Sins: Supernova Intensive Study - Cycle 6)

       The WF/PC-2 was used to make observations of the supernova
LMC-SN1987 and its circumstellar matter which is located in the Large
Magellanic Cloud.  The observations were completed as planned, and no
problems were noted.

   1.6 Completed Six Sets of NIC/1/2/3 7726 (NICMOS One Orbit Parallel)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make a one orbit parallel calibration observations.  The observations were
executed as scheduled, and no anomalies were noted.

   1.7 Completed Five 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.

   1.8 Completed NIC/2 7330 (The Fueling of Active Nucleii: A NICMOS
Snapshot Survey)

       The Near Infrared Camera (Camera Two) was used to probe the dark
matter distribution of NGC-157, far from the center, by observing
intervening absorption from the MgII doublet (lambda 2800) in the spectrum
of one background QSO located in a geometrically optimal position. HST
observations are required because this feature is in a wavelength range not
accessible from the ground, and the QSO magnitudes and expected strength of
absorption make IUE observations unfeasible.  As first mentioned in
yesterday's report, two FHST updates failed immediately before this
proposal began.  There was no reported effect on the observations.
Otherwise, there were no further anomalies.

   1.9 Completed WF/PC-2 7476 (Sakurai's Nova-Like Object: Real-Time
Monitoring of a Stellar Thermal Pulse)

       The WF/PC-2 was used to make images of Sakurai's nova-like object in
order to do real-time monitoring of a stellar thermal pulse.  The eruption
of Sakurai's nova-like variable in Sagittarius presents a
"once-in-a-lifetime" opportunity for real-time observations of a star
undergoing a final helium thermal pulse.  The observations were completed
as planned, and no anomalies were reported.

   1.10 Completed Two Sets of WF/PC-2 6253 (Pure Parallel Archive Program)

       The WF/PC-2 was used to execute a pure parallel program taking
ultraviolet observations running concurrent 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.

   1.11 Completed WF/PC-2/NIC/2 7450 (The Formation of Bulges of Spiral
Galaxies: Central Visual-Infrared Color Gradients)

       The WF/PC-2 and the NIC (Camera Two) were both used to make
observations of the bulge in spiral galaxy NGC-5838 in order to obtain
high-resolution optical and near infrared images for a complete survey
sample of bulges of spiral galaxies.  The observations were completed as
scheduled, and no anomalies were reported.

   1.12 Completed Two Sets of 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.

   1.13 Completed NIC/2 7327 (Elliptical Galaxy Evolution at High Redshift:
IR Imaging of 60 Distant Clusters)

       The Near Infrared Camera (Camera Two) was used to make infrared
observations of high redshifted elliptical galaxies in galactic cluster
CL1341+000.  By measuring the structural properties of high redshift
cluster elliptical galaxies, it is hoped to resolve the controversy
regarding the age and formation history of bright cluster ellipticals.  The
observations were executed as scheduled, and no anomalies were noted.

   1.14 Completed FGS 6880 (Parallax of RW Tri)

       The FGSs were used to make astrometric observations of the variable
star RW-Tri.  RW-Tri is an old nova for which a precise parallax would
increase the validity of any astrophysical investigations.  The
observations were completed as planned, and no problems were reported.

   1.15 Completed FOC/96 6667 (The Far-UV Evolution of Elliptical Galaxies)

      The Faint Object Camera (f/96) was used to make far-ultraviolet
observations of the large elliptical galaxy G158-100.  The far-UV spectra
of nearby giant elliptical galaxies are characterized by a "UV rising
branch", which varies greatly in strength from galaxy to galaxy.  The
observations were executes as planned, and no problems were reported.

   1.16 Completed Three Sets of NIC/1/2/3 7729 (NICMOS Short One Orbit
Parallel)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
obtain "JHK" imaging of sky regions while another instrument was prime.
These observations were  part of the short NICMOS one orbit parallel
program.  The observations were executed as scheduled, and no anomalies
were noted.

   1.17 Completed WF/PC-2 6836 (Light Curve of an Eclipsing Millisecond Pulsar)

       The WF/PC-2 was used to make observations of the eclipsing
millisecond pulsar PSRJ2051-0 in order to obtain its light curve.  This
pulsar is an exciting new millisecond pulsar which is in a 2.38 hour
circular orbit about a 0.03 solar mass companion which eclipses the pulsed
radiation from the pulsar for 20 minutes each orbit.  The companion is only
the second eclipsing millisecond pulsar companion identified optically.
The observations were executed as scheduled, and no anomalies were noted.

   1.18 Completed NIC/2 7331 (Near-IR Properties of the Bulges of Spiral
Galaxies)

       The Near Infrared Camera (Camera Two) was used to make infrared
observations of the bulge in spiral galaxy NGC-4594.  Near-IR data at HST
resolution are essential for correcting for the effect of dust and will
enable us to derive robust nuclear properties for the sample.  The
observations were executed as scheduled, and no anomalies were noted.




2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 12
                                        Successful : 12

                          Scheduled Reacquisitions : 4
                                        Successful : 4

   2.2 FHST Updates:

                              Scheduled : 32
                             Successful : 32

   2.3 Operations Notes:

       The K10 bypass relay was closed at 191/1411Z.

       The SSR Interrupt Log was dumped at 192/0022Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science and SMOV operations.

/DMH