HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1944

PERIOD COVERED:  0000Z (UTC) 08/18/97 - 0000Z (UTC) 08/19/97

Daily Status Report as of 231/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Two Sets of STIS/CCD 7605 (STIS CCD Target Acquisition
Workout)

       Following updates of STIS flight acquisitions and acq/peak software,
there was a redemonstration of the capability to perform point source and
peakup acquisitions of two bright target stars, PKS1255-31 and RXJ1347.5.
Then there was a demonstration of the ability of the STIS Flight Software
to locate targets more typical of those in the science program.  The
acquisitions were completed as planned, and no anomalies were reported.

   1.2 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.

   1.3 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.

   1.4 Completed STIS/CCD 7782 (STIS Non-Scripted Parallel Archive Proposal
- Half Orbit)

       The Space Telescope Imaging Spectrograph (CCD) was used for a
non-scripted parallel archive proposal (one-half orbit).  The observations
were executed as scheduled, and no anomalies were noted.

   1.5 Completed NIC/1/2/3 7701 (NICMOS Short One Orbit Parallel)

       The Near Infrared Camera (Cameras One, Two and Three) was used as
part of a short NICMOS one orbit parallel program, to obtain "JHK" imaging
of sky regions when another instrument is prime.  The observations were
completed as scheduled, and no anomalies were reported.

   1.6 Completed Five Sets of STIS/CCD 7620 (WF/PC-2 CYCLE 7 Standard Darks)

       The Space Telescope Imaging Spectrograph (CCD) was used to make disk
calibrations.  These dark calibration programs obtain dark frames every
week in order to provide data for the ongoing calibration of the CCD dark
current rate, and to monitor and characterize the evolution of hot pixels.
Over an extended period these data will also provide a monitor of radiation
damage to the CCDs.  The observations were executed as scheduled, and no
anomalies were noted.

   1.7 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 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.

   1.8 Completed STIS/MA2 7644 (STIS NUV-MAMA Monitoring Flats)

       The Space Telescope Imaging Spectrograph (MA2) was used to obtain
Near Ultraviolet-MAMA flat-field observations for the construction of
bi-monthly delta-flats.  The observations were completed as planned, and no
problems were reported.

   1.9 Completed WF/PC-2 6659 (A Search For Superplanets Around Weak T-
Tauri Stars)

       The WF/PC-2 was used to make observations in the 1 micron band of
the T-Tauri class star HBC630 in order to search for superplanets.  Weak
T-Tauri class stars (WTTS) are thought to have dissipated their
circumstellar disks recently, possibly by forming planetary systems.  The
observations were completed as planned, and no anomalies were reported.

   1.10 Completed Six Sets of WF/PC-2 7620 (WF/PC-2 CYCLE 7 Standard Darks)

       The WF/PC-2 was used to make a series of Cycle 7 standard dark
calibration images.  This calibration program obtains dark frames every
week in order to provide data for the ongoing calibration of the CCD dark
current rate, and to monitor and characterize the evolution of hot pixels.
The observations were executed as scheduled, and no anomalies were noted.

   1.11 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-5005, far from the center, by observing
intervening absorption from the Mg II 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.  The proposal completed as
expected with no anomalies.

   1.12 Completed STIS/CCD/MA1/MA2 7091 (STIS Pixel-To-Pixel Response
Stability)

       The Space Telescope Imaging Spectrograph (CCD/MA1/MA2) was used to
make observations of standard star BD8D4211 in order to determine the
pixel-to-pixel response stability.  This is to illustrate that STIS has the
capability of achieving signal to noise ratio of 100:1 in both Band 1
{115-170 nm} and Band 2 {165 - 310 nm}.  The observations were completed as
scheduled, and no anomalies were noted.

   1.13 Completed Five Sets of WF/PC-2 7713 (WF/P-2 Cycle 7 Supplemental
Darks pt3/3)

       The WF/PC-2 was used to make supplemental dark calibration images.
This calibration program obtains three dark frames every day to provide
data for monitoring and characterizing the evolution of hot pixels.  The
observations were completed as planned, and no anomalies were noted.

   1.14 Completed Two Sets of WF/PC-2 6431 (Determination of the
Extragalactric Distance Scale)

       The WF/PC-2 was used to make observations of the galaxies NGC-1425
and NGC-1326 to be used in measuring the periods of Cepheid variable stars
within these galaxies.  This will allow for a more accurate estimate of the
distances to these galaxies through the period-luminosity relation for the
Cepheid stars.  The observations were executed as scheduled, and no
anomalies were noted.

   1.15 Completed Five 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.

   1.16 Completed STIS/MA1 7728 (STIS FUV-MAMA Monitoring Flats)

       The Space Telescope Imaging Spectrograph (MA1) was used for the STIS
MAMA flat monitoring program.  This program will obtain
Far-Ultraviolet-MAMA flat-field observations for the construction of
Delta-flats for select modes.  The observations were completed as planned,
and no anomalies were reported.

   1.17 Completed Four Sets of STIS/CCD 7781 (STIS Non-Scripted Parallel
Archive Proposal - Full Orbit)

       The Space Telescope Imaging Spectrograph (CCD) was used for a
non-scripted parallel archive proposal (one full orbit).  No details were
given.  The observations were executed as scheduled, and no anomalies were
noted.

   1.18 Completed Two Sets of NIC/1 7451 (Gravitational Lensing by Damped
Ly-Alpha Absorbers)

       The Near Infrared Camera (Camera One) was used to make observations
of object PG0117+213 in order to study gravitational lensing in damped
Lyman-Alpha absorbers.  Damped Lyman-Alphas are thought to arise in the
disk of the progenitors of present-day spiral galaxies.  The observations
were completed as scheduled, and no problems were reported.

   1.19 Completed FGS 6877 (Parallax of Feige-24)

       The Fine Guidance Sensors were used to make astrometric observations
of the X-ray source and interacting binary system Feige-24 and several
other reference stars.  A precise parallax would increase the validity of
many astrophysical investigations.  The observations were executed as
scheduled, and no anomalies were reported.

   1.20 Completed NIC/1/2/3 7328 (High Resolution IR Imaging Survey (IRIS)
of the Centers of the Nearest Active Galaxies)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make high resolution infrared observations of the nearest active Markarian
galaxy in order to study its inner nuclear region.  Observing in the
near-IR minimizes the dust obstruction and maximizes sensitivity to the old
stellar population which dominates the mass.  The observations were
executed as scheduled, and no anomalies were noted.





2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 8
                                        Successful : 8

                          Scheduled Reacquisitions : 8
                                        Successful : 8

   2.2 FHST Updates:

                              Scheduled : 9
                             Successful : 9

   2.3 Operations Notes:

       The transition to PDB 52.B was completed as ESS installation was
performed at 230/1403Z.

       DF-224 flight software 9.9 installation was completed at
approximately 230/1730Z.  This software provides the capability to
autonomously monitor gyro motor currents, and to take a gyro off-line if
that gyro is operating outside a pre-defined operating range.  This
capability replaces manual procedures previously used.

       ESTR-2R re-conditioning was accomplished at 230/1930Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH