HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2012

PERIOD COVERED:  0000Z (UTC) 11/25/97 - 0000Z (UTC) 11/26/97

Daily Status Report as of 330/0000Z

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 7711 (STIS CCD G750L Fringing Flats.)

       The Space Telescope Imaging Spectrograph (CCD) was used to
investigate and monitor the STIS CCD flat-field fringing in the G750L
grating at its nominal wavelength setting {7751A}.  WAVECALs were also
taken at the same gain and wavelength setting.  Typical S/N = 100 for each
integration, and gain = 4 on each.  The observations were executed as
scheduled, and no anomalies were noted.

   1.3 Completed STIS/CCD/MA2/WF/PC-2 7515 (UV-Optical Spectra and Imagery
of the Bubble Galaxy NGC 7635)

       The Space Telescope Imaging Spectrograph (CCD/MA2) and the WF/PC-2
were used to acquire UV-optical STIS spectra and WFPC2 imagery of the
wind-blown Bubble Nebula NGC 7635.  The nebula's nearly spherical shell is
the result of a recent {< 10^6 years} stellar mass-loss event and is the
best young, clearly observed bubble available for study.  The ionization
front at the rim of the bubble will be examined, and the extent to which it
is shock-driven and the scale of the photoevaporative flow off the face of
the molecular cloud will be determined.  The EMC retry event, described in
HSTAR 6252 and yesterday's report, occurred near the beginning of this
proposal.  Otherwise, the observations were completed as scheduled, with no
further reported problems.

   1.4 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.

   1.5 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 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.

   1.7 Completed NIC/2/3 7812 (NICMOS Modified Short One Orbit Parallel)

       The Near Infrared Camera (Cameras Two and Three) was used to obtains
JH imaging of sky regions when another instrument is prime.  Two dither
positions are obtained for each filter.  The observations were completed as
scheduled, and no anomalies were reported.

   1.8 Completed STIS/CCD 7670 (MAMA Ramp-up Test)

       The Space Telescope Imaging Spectrograph (CCD) was used to conduct a
MAMA ramp-up test.  The purpose of this program is to measure the short
term stability of the count rates on both MAMA detectors immediately after
high-voltage turn-on.  The observations were executed as scheduled, and no
anomalies were noted.

   1.9 Completed 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.

   1.10 Completed STIS/MA1/MA2 7774 (Deep MAMA PSFs)

        The Space Telescope Imaging Spectrograph (MA1 and MA2) was used to
conduct a deep point spread function calibration (i.e., PSF).  This test is
used to determine the PSF profile as a function of wavelength for the MAMA
imaging modes, extending into the wings of the PSF.  The observations were
completed as planned, and no problems were reported.

   1.11 Completed Ten Sets of 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.

   1.12 Completed WF/PC-2 6905 (WF/PC-2 Cycle 6 Calibration: Internal Monitor)

       The WF/PC-2 was used to make several internal calibration
observations including biases and internal flats as part of a Cycle 6
calibrations procedure.  A variety of internal exposures are run weekly to
verify and monitor the health of the camera.  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 complete as scheduled, and no
anomalies were reported.

1.14 Completed NIC/1/2 7454 (The Stellar Content of Powerful Radio Galaxies
-- A NICMOS Survey of 0.8 < z < 1.8 3CR Sources)

       The Near Infrared Camera (Cameras One and Two) was used to make
survey observations of the powerful radio galaxy 3C256.  The study of
distant radio galaxies is complicated by their powerful active nucleus,
whose emission dominates at rest-frame ultraviolet wavelengths, producing
the observed peculiar, elongated morphologies; the underlying stellar
component is lost in the glare.  The observations were completed as
planned, and no anomalies were reported.

   1.15 Completed Nine Sets of STIS/CCD 7783 (STIS Parallel Science)

       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.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 7
                                        Successful : 7

                          Scheduled Reacquisitions : 6
                                        Successful : 6

   2.2 FHST Updates:

                              Scheduled : 14
                             Successful : 14

   2.3 Operations Notes:

       There were no reported operational problems.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH