HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1948

PERIOD COVERED:  0000Z (UTC) 08/22/97 - 0000Z (UTC) 08/25/97

Daily Status Report as of 237/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Six 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 guide star acquisiton and subsequent re-acquisitions in effect
for the first iteration of this propossal defaulted to fine lock on FGS-1
only.  For details see HSTAR 6156.  Otherwise, the observations were
executed as scheduled, and no further anomalies were noted.

   1.2 Completed 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.  The observations were completed as
planned, and no anomalies were reported.

   1.3 Completed Three Sets of STIS/CCD/WF/PC-2 6497 (An Ultra-Deep Study
of Comets in the Kuiper Belt)

       The Space Telescope Imaging Spectrograph (CCD) and WF/PC-2 were used
to make observations of the Kuiper Belt ultra-deep object KB1.  This
object, and about 30 Halley-sized objects like it, have been reported to be
detected in the Kuiper belt using HST/WF/PC-2 observations taken during
Cycle 4.  During the second iteration of this proposal, HSTAR 6157 notes
that while all of the re-acquisitons eventually succeeded, there were
difficulties in each with the scan steps limit being exceeded.  Also,
during the final iteration, as described in HSTAR 6158, the initial
acquisition defaulted to fine lock backup on FGS-1 only at 235/034514Z.
Otherwise, the observations were completed as planned, and no anomalies
were reported.

   1.4 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-7392, 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.

   1.5 Completed Three Sets of 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.

   1.6 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-1365
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.

   1.7 Completed Fifteen 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.

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

       The Space Telescope Imaging Spectrograph (MA2) 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.

   1.9 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-6239.  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.

   1.10 Completed WF/PC-2 6934 (WF/PC-2 Cycle 6 Photometric Zero-Point)

       The WF/PC-2 was used to make observations of standard star SA98-650
in order to complete a zero-point calibration observation.  The purpose of
this program is to verify synthetic zero-point of the WF/PC-2 filters.  The
acquisition for this proposal defaulted to fine lock backup on FGS-3 only
at 236/005638Z.  HSTAR 6159 was written.  Otherwise, the observation was
executed as scheduled, and no anomalies were noted.

   1.11 Completed Three Sets of 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 first of
these proposals were affected by the FGS fine lock backup mentioned in
1.10.  Otherwise, the observations were executed as scheduled, and no other
anomalies were noted.

   1.12 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 targets were
listed as an unknown target.  The observations were completed , and no
problems were reported.

   1.13 Completed WF/PC-2 5905 (The Stellar Halo Metallicity Distribution
of the Giant Elliptical NGC 5128)

       The WF/PC-2 was used to study the stellar halo metallicity
distribution around the giant elliptical galaxy NGC-5128.  These data will
allow us to determine accurately for the first time the mean metallicity
and metallicity range of the oldest and most metal-poor field stars in a
large elliptical galaxy, and thus constrain the level of enrichment which
occurred during the earliest star formation.  The observations were
completed as scheduled, and no problems were reported.

   1.14 Completed Five Sets of STIS/CCD/MA1 7722 (Lamp Flux Measurements)

       The Space Telescope Imaging Spectrograph (CCD and MA1) was used to
make lamp flux calibration measurements to determine the optimal
configuration for obtaining science-contemporaneous wavecals.  The
observations were executed as scheduled, and no anomalies were noted.

   1.15 Completed NIC/2 7420 (A Near-Infrared Search for Very Low Mass
Companions to Stars Within 10 Parsecs of the Sun)

       The Near Infrared Camera (Camera Two) was used to make searching
observations for very low mass companions to variable star HD260655.  This
star is known to be within 10 parsecs of the Sun.  The observations were
executed as scheduled, and no anomalies were noted.

   1.16 Completed WF/PC-2 6866 (Luminous Stars in Old Stellar Populations)

       The WF/PC-2 was used to make observations of several luminous stars
in old stellar populations within galaxies in the Fornax Galactic Group.
Two outstanding problems in stellar populations are the existence of
luminous asymptotic giant branch stars in the bulges of Local Group
galaxies and the existence of an ultraviolet upturn in the spectral energy
distribution of many early type galaxies.  The observations were executed
as scheduled, and no anomalies were noted.

   1.17 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 PHL-1226 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.

   1.18 Completed NIC/1 7255 (NICMOS Observations of JVAS/CLASS
Gravitational Lenses)

       The Near Infrared Camera (Camera One) was used to make observations
of the JVAS class, gravitational lens,  quasi-stellar source QS0-0716+4.
The JVAS/CLASS radio survey has been the most successful to date at finding
arcsecond-scale gravitational lenses, almost doubling the known number (11
lenses found of which 10 are new discoveries).  The observations were
executed as scheduled, and no anomalies were noted.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 14
                                        Successful : 14

       See 1.3, 1.10, and 1.11 for mention of fine lock defaults to single
FGS control.


                          Scheduled Reacquisitions : 28
                                        Successful : 28

       See 1.3 for a description of re-acquisiton difficulties.

   2.2 FHST Updates:

                              Scheduled : 33
                             Successful : 33

   2.3 Operations Notes:

       A quiet weekend was experienced by operations personnel.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH