HUBBLE SPACE TELESCOPE
                       DAILY REPORT #1946

PERIOD COVERED:  0000Z (UTC) 08/20/97 - 0000Z (UTC) 08/21/97

Daily Status Report as of 233/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

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

       As reported in yesterday's report, the guide star acquisition for
this proposal failed and the take data flag remained down.  No further
anomalies were noted.

   1.2 Completed NIC/2 7418 (Imaging of Younf Stellar Object Circumstellar
Nebulosity)

       As reported in yesterday's report, the guide star acquisition for
this proposal failed and the take data flag remained down.  No further
anomalies were reported.

   1.3 Completed WF/PC-2 Two Sets of 7619 (WF/PC-2 Cycle 7 Decontamination)

       The WF/PC-2 was used to conduct a Cycle 7 decontamination procedure.
Ultraviolet-blocking contaminants are removed, and hot pixels cured, by
warming the CCDs to +20C for six hours.  A variety of internal images are
taken before and after the decontamination in order to verify its success
and to monitor the instrument health.  The procedures were conducted as
scheduled, and no problems were reported.

   1.4 Completed Two Sets of 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 bulges in spiral galaxies NGC-4750 and NGC-2397.
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.

   1.5 Completed FGS 7491 (The Masses of the Brown Dwarf Candidate GL 623B)

       The FGSs were used to conduct astrometry at 1-mas accuracy of faint
companions to nearby M-dwarfs.  This is the most productive direct method
to determine accurate masses of stars near the end of the main sequence.
>From preliminary FGS results we estimate the mass of GL 623B as 0.10 solar
masses, placing both near the stellar/substellar border.  Such a mass
determination for GL 623B should establish conclusively its nature as star
or substellar object.  The observations were executed as scheduled, and no
anomalies were noted.

   1.6 Completed Three 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.

   1.7 Completed Three 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 Five 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.

   1.9 Completed 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 star L145-141 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.

   1.10 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.

   1.11 Completed NIC/1/2/3 7412 (An HST/NICMOS Search for Young Brown
Dwarfs and Giant Planets)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations taken in parallel with the prime science observations to
be part of a survey to look for large planets and/or small brown dwarf
stars which are in orbit around T-Tauri class stars.  At an age of 2 to 20
million years these low-mass companions will be considerably brighter than
more evolved brown dwarfs or giant planets orbiting main-sequence stars,
and hence will be much easier to detect.  The observations were completed
as planned, and no anomalies were noted.

   1.12 Completed WF/PC-2/NIC/2 6860 (Stellar Polulations in the LMC)

       The Near Infrared Camera (Camera Two) was used to extend HST WFPC2
studies of low mass stars in the LMC through observations of a field in the
SMC which is near the bar. The resulting CMDs will be modelled using
isochrones to recover the lower stellar IMF and to search for the
signatures of episodic star formation in these galaxies.  The observations
were completed as planned with no reported anomalies.

   1.13 Completed Four Sets of STIS/CCD 7783 (STIS)

        The Space Telescope Imaging Spectrograph (CCD) was used to make
observations taken in parallel with the prime science.  The observations
were completed, and no problems were reported.

   1.14 Completed NIC/1 7451 (Gravitational Lensing by Damped Ly-Alpha
Absorbers)

       The Near Infrared Camera (Camera One) was used to make observations
of object PSK0405+03 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.

   1.15 Completed FOC/96 6927 (Polarization Images of Radio Galaxies)

       The Faint Object Camera (f/96) was used to conduct
spectropolarimetry of the narrow line radio galaxy 3C234.  This galaxy was
used to show in 1982 that there is a hidden broad line region occulted by
an opaque torus oriented perpendicular to the radio structure axis.  Given
the luminosity of the reflected light, it follows that 3C234 would be
called a quasar if its orientation with respect to the line of sight were
different.  The observations completed with no reported problems.

   1.16 Completed WF/PC-2 6431 (Determination of the Extragalactric
Distance Scale)

       The WF/PC-2 was used to make observations of the galaxy NGC-1425 to
be used in measuring the periods of Cepheid variable stars within this
galaxy. 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.

   1.17 Completed Two Sets of NIC/1/2/3 7726 (NICMOS One Orbit Parallel)

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

   1.18 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.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 8
                                        Successful : 8
                          Scheduled Reacquisitions : 9
                                        Successful : 9

   2.2 FHST Updates:

                              Scheduled : 14
                             Successful : 14

   2.3 Operations Notes:

       The STIS "Bad Pixel" Table was uplinked at 232/1526Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       NICMOS flight software version 4.08 installation is scheduled for
233/1248Z.

/DMH