HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1990

PERIOD COVERED:  0000Z (UTC) 10/23/97 - 0000Z (UTC) 10/24/97

Daily Status Report as of 297/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed 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 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 acquisition failure detaied in 2.1 affected the final
iteration of this proposal.  Otherwise, the observations were executed as
scheduled, and no further anomalies were noted.

   1.3 Completed Eight 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.

   1.4 Completed Eight Sets of 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.

   1.5 Completed STIS/CCD/MA1 7432 (Morphological and Spectral Evolution of
Galaxies)

       The Space Telescope Imaging Spectrograph (CCD and MA1) was used to
make observations to study the morphological and spectral evolution of
galaxy 3C246.  A library of ultraviolet images of normal galaxies at low
redshifts is essential to our understanding of the properties and evolution
of the high redshift universe.  The observations were completed as planned,
and no problems were reported.

   1.6 Completed 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.

   1.7 Completed NIC/2 7498 (NICMOS Imaging Survey of Distant Radio
Galaxies. Ellipticals at Z > 2 ?)

       The Near Infrared Camera (Camera Two) was used to make high
resolution and high signal-to-noise ratio imaging survey observations of
the radio galaxy MRC2048-27.  The existence and photometric properties of
massive elliptical galaxies at high redshift provide a powerful probe of
galaxy evolution.  The observations were executed as scheduled, and no
anomalies were noted.

   1.8 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 acquisition
failure detaied in 2.1 affected the final iteration of this proposal.
Otherwise, the observations were completed, and no further problems were
reported.

   1.9 Completed STIS/CCD/NIC/1/2 7566 (Demographics of Nuclear Black Holes)

       The Space Telescope Imaging Spectrograph (CCD) and the Near Infrared
Camera (Cameras One and Two) were used to make observations of normal
galaxy HR7615 to try and detect a super massive black hole.  Dark and
wavelength calibration images were also taken.  The observations were
executed as scheduled, and no anomalies were noted.

   1.10 Completed 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.

   1.11 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 it's 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.

   1.12 Completed Two Sets of WF/PC-2/NIC/3 7382 (The Star-Formation
History of the Large Magellanic Cloud)

       The WF/PC-2 and the Near Infrared Camera (Camera Three) were used to
make observations of the disk of the Large Magellanic Cloud.  These data
will enable us to quantitatively study the intermediate to low-mass stellar
populations and the star-formation history of the LMC.  The observations
were executed as scheduled, and no anomalies were noted.

   1.13 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 acquisition
failure detaied in 2.1 affected this proposal.

   1.14 Completed WF/PC-2 6839 (WF/PC-2 Imagery of the Dusty H-II Region
SMC N88A)

       The WF/PC-2 was used to make observations of nebula NEB-012409
(a.k.a. , SMC N88A), which is a H-II region, inside of the Large Magellanic
Cloud.  This small H-II region is unusual in the metal-poor and relatively
dust-free interstellar medium environment of the SMC in that it is heavily
reddened and shows a peculiar ionization structure compared to other SMC
H-II regions. The acquisition failure detaied in 2.1 affected this proposal.

   1.15 Completed STIS/CCD 7781 (STIS Non-Scripted Parallel Archive
Proposal - Full Orbit)

       The Space Telescope Imaging Spectrograph (CCD) was to be used for a
non-scripted parallel archive proposal (one full orbit).  The acquisition
failure detaied in 2.1 affected this proposal.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 6
                                        Successful : 5

       Per HSTAR 6216, the guide star acquisition at 296/203440Z to gyro
control.  A map showed that the attitude was good, with a search radius of
30 as for FGS-1.  PMT counts for both FGSs appeared to be low.  An attitude
reference update was performed at 297/020323Z to remove the effects of
several hours of gyro drift.  The proposals detailed in 1.2, 1.8, 1.13,
1.14, and 1.15 were affected, as well as three proposals occurring during
the period of the next report.

                          Scheduled Reacquisitions : 7
                                        Successful : 7

   2.2 FHST Updates:

                              Scheduled : 11
                             Successful : 11

   2.3 Operations Notes:

       The STIS Bad Pixel Table was uplinked at 296/1857Z.

       The Battery 1 Capacity Check was started at 296/1859Z.  Discharging
began at 296/223057Z.

       The SSR interrupt log was dumped at 297/0001Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH