HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1880

PERIOD COVERED:  0000Z (UTC) 05/16/97 - 0000Z (UTC) 05/19/97

Daily Status Report as of 139/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed WF/PC-2 6903 (WF/PC-2 Cycle 6 Calibration: Decontamination)

       The WF/PC-2 was used to make several calibration bias observations,
internal flats, K-Spot images and dark calibration images which are all
part of a Cycle 6 decontamination procedure.  No science was interleaved
with the dark exposures.  The observations were completed as scheduled, and
no problems were reported.

   1.2 Completed Two Sets of WF/PC-2 6359 (Core Properties of the Bulges of
Spiral Galaxies)

       The WF/PC-2 was used to make snapshot survey observations of spiral
galaxies NGC-3177 and NGC-7690 in order to study their central bulges.  The
aim is to investigate the core properties, correlations with global
galactic properties, and the frequency of occurrence of multiple and/or
miscentered nuclei.  The observations were completed as scheduled, and no
anomalies were noted.

   1.3 Completed STIS/CCD 7147 (STIS Fine Corrector Alignment With CCD)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of the standard star GRW+70D582 in order to perform a fine
corrector alignment with the CCDs such that the image quality at the slit
plane is optimized.  The observations were completed as planned, and no
anomalies were reported.

   1.4 Completed WF/PC-2 6861 (Young Globular Clusters in the Interacting
Galaxy  NGC 3597)

       The WF/PC-2 was used to make observations of the interacting galaxy
NGC-3597 in order to study its globular clusters.  Observing sites of young
globular cluster formation may provide important insights into formation
mechanisms.  The observations were executed as scheduled, and no anomalies
were noted.

   1.5 Completed Eleven Sets of NIC/1/2/3 7048 (NICMOS Parallel Thermal
Background Test)

       The Near Infrared Cameras (Cameras One, Two and Three) were used to
make observations of an object designated as Target-1 in order execute
measurements of the stability of the HST thermal emissions.  The
observations were executed as scheduled, and no problems were reported.

   1.6 Completed Six Sets of WF/PC-2 6909 (WF/PC-2 Cycle 6 Calibration:
Earth Flats

       The WF/PC-2 was used to make observations of the bright Earth to
obtain streak flats which are used to construct high quality flat fields
for the WF/PC-2 filter set.  The observations were executed as scheduled,
and no anomalies were noted.

   1.7 Completed NIC/1/2/3 7043 (NICMOS Focus Monitor)

       The Near Infrared Cameras (Cameras One, Two and Three) were used to
make observations of NGC-3603 in order to make focus calibration and
monitoring measurements.  This proposal is built to run NIC/1/2 focus
sweeps on a weekly basis, and NIC/3 focus sweeps twice a week during SMOV.
The observations were executed as scheduled, and no anomalies were noted.

   1.8 Completed Five Sets of WF/PC-2 7553 (Pure Parallel Archive Survey II)

       WF/PC-2 parallel observations were obtained in the ultraviolet in
search for interesting objects.  This program is designed to find
extragalactic sources with near ultraviolet excesses (3000 A0) outside the
galactic plane and far ultraviolet sources (1600 A0) in the galactic plane.
The procedure was executed as scheduled, and no anomalies were reported.

   1.9 Completed WF/PC-2 6662 (Observation of Short Timescale Variability
of the Jovian UV Aurora)

       The WF/PC-2 was used to make observations of the aurora on the
planet Jupiter in order to study its short timescale variability.  Previous
FOC and WF/PC-2 observations have shown the very complex morphological
structure of the Jovian ultraviolet aurora and its unexpectedly strong
temporal variations.  The observations were completed as planned and no
problems were reported.

   1.10 Completed Two Sets of FGS 7027 (Near Term Stability Monitor For FGS1R)

       The Fine Guidance Sensor (1-R) were used to make astrometric
observations of the reference stars known as FF-3 Target (et al.) in order
to monitor its near term stability.  The goals are threefold: (1) to
establish the baseline long term stability measurement for the new FGS and
monitor changes in the relative plate scale and distortion since the SMOV
Mini-OFAD; (2) to monitor changes in the transfer function on an orbital
time scale and over weeks; (3) to monitor desorption changes in the
position of the ITS.  The observations were executed as scheduled, and no
anomalies were noted.

   1.11 Completed NIC /2 7154 (NICMOS Coronographic Hole Monitor)

       The Near Infrared Camera (NIC Two) was used to make observations of
object NGC-3603 in order to monitor the effects of coronagrapghic hole.
The purpose of this proposal is to take lamp flats with camera 2 (and
cameras 1 and 3 occasionally) to monitor the location of the coronographic
spot.  The observations were completed as scheduled, and no anomalies were
reported.

   1.12 Completed WF/PC-2 6772 (Dust Properties in the Beta Pictoris)

       The WF/PC-2 was used to make observations of the edge-on dust disk
around HD39060 (a.k.a., Beta Pictorius).  Multicolor imaging polarimetry is
an excellent diagnostic of dust grain properties and scattering geometries.
The observations were completed as planned, and no anomalies were reported.

   1.13 Completed Two Sets of STIS/CCD 7142 (STIS CCD Flatfielding)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
field flatting calibration observations.  These CCD delta-flats are
intended to monitor CCD stability over monthly time scales.  The
observations were completed as planned, and no problems were reported.

   1.14 Completed Four Sets of WF/PC-2 6346 (Snapshot Survey of the
Ultraluminous IRAS Galaxy Sample-Part 1 High)

       The WF/PC-2 was used to make snapshot survey observations of the
ultraluminous IRAS galaxies QDOTULIR08, CL-ULIR001, NGWULIR131 and
QDOTULIR10.  These data will be searched for multiple cores, which imply a
merger has occurred, and for starburst regions.  The observations were
executed as scheduled, and no anomalies were noted.

   1.15 Completed Three Sets of STIS/CCD 7107 (STIS CCD Hot Pixel Annealing)

       The Space Telescope Imaging Spectrograph (CCD) was run though an
annealing process.  A bias and a dark calibration image were also taken.
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.  In addition CTE
performance is examined by looking for traps in a low signal level flat.
The observations were executed as scheduled, and no anomalies were noted.

   1.16 Completed Two Sets of WF/PC-2 6887 (A Photometric Search for Faint
Companions to Nearby Stars)

       The WF/PC-2 was used to make a photometric search observations of
the nearby stars HD61421 and HD48915 in order to look for possible
companions.  The technique involves use of the Planetary Camera with wide
band pass filters to photometrically measure for the presence of resolved
dark companions.  The observations were executed as scheduled, and no
anomalies were noted.

   1.17 Completed WF/PC-2 6853 (Emission Features Near Eclipsed Io)

       The WF/PC-2 was used to make observations of Jupiter's moon Io
during an eclipse of that moon.  The high spatial resolution of the WF/PC-2
will allow an extension of the ground based observations of interactions
between Io and the Jovian plasma torus.  The observations were completed as
scheduled, and no anomalies were reported.

   1.18 Completed WF/PC-2 6555 (What Causes the Astigmatism in
Gravitational Lenses?)

       The WF/PC-2 was used to make observations of the gravitationally
lensed quasar system PG1115+080 in order to study why these systems produce
astigmatic gravitational lenses.  Among multiply imaged quasars, those for
which the shape of the lensing mass can be measured show surprisingly
strong deviations from circular symmetry (i.e., astigmatism in the
gravitational lens).  The observations were completed as planned, and no
problems were reported.

   1.19 Completed Three Sets of WF/PC-2 6741 (Synoptic Monitoring of
Seasonal Phenomena on Mars)

       The WF/PC-2 was used to make observations of the planet Mars as part
of a program of synoptic monitoring of the planet's seasonal phenomena.
This is an especially important period because Mars Pathfinder and Mars
Global Surveyor will be in their cruise phase during this time.  The
observations were executed as scheduled, and no anomalies were reported.

    1.20 Completed WF/PC-2 6361 (High Resolution Imaging of X-Ray Selected
AGNs)

   The WF/PC-2 was used to make high resolution observations of the known,
low, red-shifted, x-ray active galactic nucleus (AGN) MS2348.3+3.  These
data will allow a study of the optical properties of an unbiased sample of
AGN host galaxies.  The observations were completed as scheduled, and no
problems were reported.

   1.21 Completed Two Sets of STIS/CCD 7148 (STIS CCD Target Acquisition
Workout)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
images of PKS1255-31 and NGC-6833 as part of a target acquisition workout.
This is to demonstrate ability of the STIS FSW to locate targets typical of
those in the science program.  The observations were executed as scheduled,
and no anomalies were noted.

   1.22 Completed WF/PC-2 6598 (The Reddest Objects in The Universe)

       The WF/PC-02 was used to make observations of the object ERO1019+05
which is known to be one of the reddest objects in the universe.  This is
one of the members of a recent deep K-Band imaging surveys which discovered
a new population of infrared bright, extremely red (R-K~gt 6 class),
objects (EROS).  The observations were completed as scheduled, and no
anomalies were reported.

   1.23 Completed WF/PC-2 7533 (Structural Properties of Brightest Cluster
Galaxies in the HST Archive)

       The WF/PC-2 was used to make observations parallel with the prime
science observations.  The observations will be used to study the
properties of the brightest cluster galaxies contained in the HST computer
achieve.  This unique data set will also allow for the first time to test
the core radius (surface brightness relation as a function of redshift
which, assuming scaling laws are time invariant, tests the evolution of the
stellar population).  The observations were executed as scheduled, and no
anomalies were reported.

   1.24 Completed WF/PC-2 7029 (WF/PC-2 Cycle 6/SMOV Lyman Alpha Check-Part 2)

       The WF/PC-2 was used to make observations of the WD0310-688 in order
to obtain far-ultraviolet (Lyman Alpha) measures of the system's
throughput.  This is to quantify any contamination of the WF/PC-2 pick-off
mirror caused by SMOV activities.  The observations were completed as
planned, and no anomalies were reported.

   1.25 Completed Two Sets of WF/PC-2 6363 (The Environments and Host
Galaxies of BL-Lac Objects)

       The WF/PC-2 was used to make snapshot survey observations of BL-Lac
objects PKS2240-26 and PKS0735+17 in order to study their environment and
their host galaxies.  The goal is to investigate systematic trends in host
galaxy type, unusual morphological features, nearby companion galaxies,
etc.  The observations were executed as scheduled, and no anomalies were
noted.

   1.26 Completed STIS/CCD 7094 (STIS Sensitivity on Axis)

       The Space Telescope Imaging Spectrograph (CCD) was used to measure
the STIS relative response to a point source, BD+75D325, in the first order
modes along the slit direction.  The proposal executed as scheduled, and no
anomalies were noted.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 31
                                        Successful : 31

                          Scheduled Reacquisitions : 16
                                        Successful : 16

   2.2 FHST Updates:

                              Scheduled : 69
                             Successful : 69

   2.3 Operations Notes:

       Throughout the weekend, the flight opertions team (FOT) performed
checkout activities on PDB 51.B which had been installed on the backup
system.  No problems were encountered.

       At 138/1431Z, PASSOPS was re-configured to use PDB 51.B.  At
139/0420Z, all FOT checkout activities had been completed, and the
real-time string was configured to 51.B.

       DF-224 Flight Software Load 9.8 was transferred to the on-line
string at 138/1935Z in preparation for its installation later today.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Installation of DF-224 Flight Software Load 9.8 today, and the
continuation of normal science and SMOV operations.

/DMH