HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2191

PERIOD COVERED:  0000Z (UTC) 08/19/98 - 0000Z (UTC) 08/20/98

Daily Status Report as of 232/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Three Sets of WF/PC-2 7712 (WF/PC-2 Cycle 7 Supplemental
Darks pt2/3)

       The WF/PC-2 was used to make a series of Cycle 7 supplemental
calibration darks.  This dark calibration program obtains 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.

   1.2 Completed Two Sets of STIS/CCD 7948 (CCD Dark and Bias Monitor --
Cont. to Dec. 98)

       The Space Telescope Imaging Spectrograph (CCD) was to be used to
measure CCD dark current and bias rates for the two supported amplifier
settings {GAIN=1 and GAIN=4} in order to gather data for making superdarks
and superbiases.  The data was to be used to track the growth of hot pixels
on the CCD in general and within the various target acquisition apertures
specifically.  Both iterations of this proposal was affected by the STIS
being commanded to suspend as described in yesterday's report.

   1.3 Completed NIC/2 7894 (Completing A Near-Infrared Search for Very Low
Mass Companions to Stars within 10 pc)

       The Near Infrared Camera (Camera Two) was used to make observations
searching for very low mass (VLM) companions to the star GQ-And.  This
search will be the largest, most sensitive, volume-limited search for VLM
companions ever undertaken.  The observations were completed as planned,
and no anomalies were reported.

   1.4 Completed NIC/1/2/3 7227 (A Search for Low Mass/Sub-Luminous
Companions to M-Stars)

   The Near Infrared Camera (Camera One, Two and Three) was used to make a
search for low mass/sub-luminous companions to the low mass M class star
GL644C.  Knowledge of stellar and sub-stellar masses and luminosities at
and below the ~0.08 M{sun} H-burning limit is of fundamental importance.  A
dark calibration image was also taken.  The observations were completed as
planned, and no problems were reported.

   1.5 Completed Seven Sets of STIS/CCD 8062 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal Continuation)

       The Space Telescope Imaging Spectrograph (CCD) was used to make high
galactic latitude observations take in parallel with the prime science
observations.  The observations were completed as planned, and no problems
were reported.

   1.6 Completed NIC/2 7853 (Deep IR Imaging of Two Gas-Rich Radio Galaxies)

       The Near Infrared Camera (Camera Two) was used to make high
resolution continuum, line and polarization images of the gas-rich radio
galaxy 3C293.  This is to obtain a deep IR image to locate the true nuclei
and clarify the structure of the galaxies in order to test merger models.
The observations were executed as scheduled, and no anomalies were noted.

   1.7 Completed Five Sets of WF/PC-2 7909 (POMS Test Proposal: WF II
Parallel Archive Proposal)

       The WF/PC-2 was used to make parallel observations as part of the
POMS test proposal.  This test proposal is designed to simulate scientific
plans.  The observations were completed as planned, and no problems were
reported.

   1.8 Completed Two Sets of WF/PC-2 8061 (POMS Test Proposal: WF-II Backup
Parallel Archive Proposal)

       This is a POMS test proposal designed to simulate scientific plans.
The proposal was executed as planned, and no anomalies were reported.

   1.9 Completed NIC/2 7826 (Near-IR Photometry of M-31's Metal-Rich
Globular Clusters)

       The Near Infrared Camera (Cameras Two) were used to make
observations of the metal-rich globular clusters in galaxy M-31.  The high
metallicities of the program clusters will make these observations of
particular interest for furthering our understanding of the evolution of
metal rich stars, and for the population synthesis models meant to study
the stellar content of distant, unresolvable bulges and elliptical
galaxies.  The observations were executed as scheduled, and no anomalies
were noted.

   1.10 Completed NIC/2 7887 (A Survey of Gravitational Lenses as
Cosmological Tools II)

       The Near Infrared Camera (Camera Two) was used to make observations
of the gravitational lens candidate system FBQ1633+31.  The propose is to
extend our IR survey of gravitational lenses and gravitational lens
candidates by obtaining NICMOS images of 14 additional lens systems or
candidates.  The observations were executed as scheduled, and no anomalies
were noted.

   1.11 Completed Two Sets of NIC/1 7214 (Variability of Galactic Center
Sources)

       The Near Infrared Camera (Camera One) was used to make observations
of the variability of galactic center objects.  A broad range of accretion
disk models with black hole masses appropriate to the Galactic Center
{0.5-3.0 million solar masses} implies variability at the 2-25% level on
time scales as short as 10 minutes.  The observations were executed as
scheduled, and no anomalies were noted.

   1.12 Completed WF/PC-2 7387 (T-Tauri Star Snapshot Survey)

       The WF/PC-2 was used to make observations of the star HD-163296 as
part of a T-Tauri class star survey.  The observations were executed as
scheduled, and no anomalies were noted.

   1.13 Completed WF/PC-2/STIS/CCD/NIC/1/2 7307 (The Formation and
Evolution of Rich Star Clusters in the LMC)

       The WF/PC-2, the Space Telescope Imaging Spectrograph (CCD), and the
Near Infrared Camera (Cameras One and Two) were used to make observations
of the rich star clusters which are located within the Large Magellanic
Cloud in order to study their formation and evolution.  These observations
will help us understand the origin and evolution of rich star clusters in
our own galaxy.  The observations were completed as scheduled, and no
anomalies were reported.

   1.14 Completed NIC/2 7329 (The Nature of the Damped LyAlpha Absorbers --
A New Study of Young Galaxies)

       The Near Infrared Camera (Cameras Two) was used to make observations
of the young galaxy/quasar Q2359-0216 in order to study the nature of its
damped Lyman-Alpha Absorbers (DLAs).  The damped Lyman-Alpha absorption
line systems, occasionally found in quasar spectra, provide one of only a
few practical methods of detecting and studying significant numbers of
galaxies at high redshifts.  The observations were executed as scheduled,
and no anomalies were noted.

   1.15 Completed STIS/CCD/MA2 7269 (The 1997/98 Eclipse of VV Cephei)

       The Space Telescope Imaging Spectrograph (CCD and MA2) was used to
make ultraviolet spectrographic observations of the long-period eclipsing
binary star HD208816 (a.k.a., VV-Cephei).  This eclipse will provide an
unprecedented opportunity to obtain spatially resolved information about
the density, ionization and velocity structure in the outer atmosphere of
the M supergiant primary.  A wave length calibration observation was also
taken.  The observations were completed as scheduled, and no anomalies were
noted.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 9
                                        Successful : 9

                          Scheduled Reacquisitions : 6
                                        Successful : 6

   2.2 FHST Updates:

                              Scheduled : 20
                             Successful : 20

   2.3 Operations Notes:

       The SSR EDAC error counter was cleared three times using ROP SR-1.

       As documented in HSTAR 6628, a NICMOS single bit error occurred at
231/190556Z.  Per ROP NS-11 and an operations request, a NICMOS internal
log memory dump was performed at 231/195826Z, and the limit was changed
from four to five.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       The IP test is scheduled to continue today.

       Continuation of normal science observations and calibrations.

/DMH