HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2027

PERIOD COVERED:  0000Z (UTC) 12/18/97 - 0000Z (UTC) 12/19/97

Daily Status Report as of 353/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 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.

   1.2 Completed STIS/CCD 7802 (Daily Darks to Update Acquisition Bad Pixel
Table)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
calibration observations to obtain daily darks to update the acquisition
bad pixel table.  These darks are intended to identify hot pixels for
update to the acquisition on-board FSW hot 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.

   1.3 Completed WF/PC-2 7622 (WF/PC-2 Cycle 7 Internal Monitor)

       The WF/PC-2 was used to make a set of Cycle 7 internal monitoring
calibration measurements.  A variety of internal exposures are obtained in
order to provide a monitor of the integrity of the CCD camera electronics
in both bays {gain 7 and gain 15}, to test for quantum efficiency in the
CCDs, and to monitor for possible buildup of contaminants on the CCD
windows.  A bias calibration and an internal flat calibration image were
also taken.  The observations were executed as scheduled, and no anomalies
were noted.

   1.4 Completed FGS 6538 (The Distances to Dwarf Novae, and the
Calibration of the Technique of Infrared Spectroscopic Parallax)

       The FGSs were used to make astrometric observations of the Dwarf
Novae RR-Cyg and several other reference stars in order to measure its
distance from its parallax.  The distance to this dwarf novae is poorly
known.  This deficiency severely impacts our ability to quantify the
energetics of the various processes taking place in dwarf novae systems.
The observations were executed as scheduled, and no anomalies were noted.

   1.5 Completed Five 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).  The observations
were executed as scheduled, and no anomalies were noted.

   1.6 Completed WF/PC-2 6521 (A Search For Outgassing From Kuiper Belt
Objects)

       The WF/PC-2 was used to make observations of the Kuiper Belt object
1993SB in order to detect forms of outgassing.  In the past three years
almost 30 small bodies lying on the inner edge of the proposed Kuiper-Belt
have been discovered using ground-based facilities.  These object are now
being studied with the HST.  The observations were executed as scheduled,
and no anomalies were noted.

   1.7 Completed FGS 6641 (Continuation of Mass Ratio Determination for
Double Stars)

       The Fine Guidance Sensors were used in both the POS and TRANS modes
to make astrometric observations of the double star L722-22 in order to
determine the mass ratio of its two components.  This binary system
contains either a low-mass star or a brown dwarf.  The observations were
executed as scheduled, and no anomalies were noted.

   1.8 Completed WF/PC-2 7786 (Pure Parallel Archive Survey - Continuation)

       The WF/PC-2 was used to make observations as part of an archival
survey program in which the images were taken in parallel with the prime
science observations.  These WF/PC-2 parallel observations were obtained in
the ultraviolet in a search for interesting objects.  The observations were
completed as planned, and no problems were reported.

   1.9 Completed STIS/CC 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.

   1.10 Completed NIC/2/3 7453 (The SBF Hubble Diagram)

       The Near Infrared Camera (Camera Two and Three) was used to make
deep NICMOS observations of galaxies NGC-1399 and NGC-1404 to determine
their distance using the surface brightness fluctuation {SBF} method.  HST
is essential for its high spatial resolution which makes it possible to
detect and remove globular clusters and background galaxies that
contaminate the SBF measurement.  The observations were executed as
scheduled, and no anomalies were noted.

   1.11 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 Spectrogrtaph (CCD), and
the Near Infrared Camera (Cameras One and Two) were used to make
observations of the rich star cluster NGC-1831 which is located within the
Large Magellanic Cloud in order to study its formation and evolution.
These observations will help us understand the origin and evolution of rich
star clusters in our own galaxy.  The observations were complete as
scheduled, and no anomalies were reported.

   1.12 WF/PC-2 6549 (Calibration of Nearby Type Ia Supernovae as Standard
Candles: NGC 3627 and SN 1989B)

       The WF/PC-2 was used to make observations of the Type Ia supernova
SN 1989B which is located in galaxy NGC-3627.  The experiment is designed
to determine the mean absolute magnitude of the B and V of SNe Ia, and how
large the dispersion is about this mean.  The observations were completed
as planned, and no problems were reported.

   1.13 Completed Two Sets of WF/PC-2 7625 (WF/PC-2 Cycle 7 Earth Flats)

       The WF/PC-2 was used to make a series of Earth flat calibration
images.  These flat fields will allow mapping of the OTA illumination
pattern and will be used in conjunction with previous internal and external
flats to generate new pipeline superflats.  The observations were completed
as planned, and no anomalies were reported.

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

       The WF/PC-2 was used to make observations of the galaxy NGC-3319 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.

   1.15 Completed NIC/1/2/WF/PC-2/STIS/CCD 7571 (Imaging and Spectra of QSO
Host Galaxies)

       The Near Infrared Camera (Cameras One and Two), the WF/PC-2, the
Space Telescope Imaging Spectrograph (CCD) were used to make observations
of the quasar 1345+584 and its host galaxy's morphology.    A wavelength
calibration observation was also taken.  All the observations were
completed as planned, and no anomalies were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 10
                                        Successful : 10

                          Scheduled Reacquisitions : 5
                                        Successful : 5

   2.2 FHST Updates:

                              Scheduled : 22
                             Successful : 22

   2.3 Operations Notes:

       An RMGA calibration was completed at 352/2030Z.

       Inhouse problems with the High Rate Switch (HRS) caused loss of the
ability to send NCC test messages or GCMRs.  The DOC hard patched the HRS
until dayshift personnel can analyze and solve the problem.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH