HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2285

PERIOD COVERED:  0000Z (UTC) 01/12/99 - 0000Z (UTC) 01/13/99

Daily Status Report as of 013/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed STIS/CCD/MA1 7291 (Cooled Gas in X-Ray Emitting Elliptical
Galaxies)

       The Space Telescope Imaging Spectrograph (CCD and MA1) was used to
make observations of the X-ray emitting elliptical galaxy TON1480.  There
are two fundamental predictions of the current popular model for X-ray
emitting gas in individual elliptical galaxies: that the origin of the gas
is stellar mass loss and that the X-ray emission cools the gas, leading to
cooled material distributed throughout the galaxy.  Wavelength calibration
observations were also taken.  The observations were executed as scheduled,
and no anomalies were noted.

   1.2 Completed WF/PC-2 7713 (WF/P-2 Cycle 7 Supplemental Darks pt3/3)

       The WF/PC-2 was used to make supplemental dark calibration images.
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 completed as planned, and no anomalies were noted.

   1.3 Completed Three Sets of WF/PC-2 8090 (POMS Test Proposal: WF-II
parallel archive proposal continuation)

       The WF/PC-2 was used in the parallel mode to make some low galactic
latitude archive observations.  The program will be used to take parallel
images of random areas of the sky.  The observations were executed as
scheduled, and no anomalies were noted.

   1.4 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.

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

       The Space Telescope Imaging Spectrograph (CCD) was 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 will be used to track the growth of hot pixels on
the CCD in general and within the various target acquisition apertures
specifically.  The observations were executed as scheduled, and no
anomalies were noted.

   1.6 Completed Two Sets of WF/PC-2 6357 (The Nuclear Morphology of
Elliptical Galaxies)

       The WF/PC-2 was used to make images of the early type, large,
elliptical galaxies NGC-2824 and NGC-5982 (taken from a list of 150
galaxies) in order to study thier nuclear morphology.  This survey will
complement Illingworth's snapshot study of later Hubble types.  The
observations were completed as scheduled, and no anomalies were reported.

   1.7 Completed Two Sets of WF/PC-2 7387 (T-Tauri Star Snapshot Survey)

       The WF/PC-2 was used to make observations of the stars SU-Aur,
IQ-Tau and AB-Aur as part of a T-Tauri class star survey.  The observations
were executed as scheduled, and no anomalies were noted.

   1.8 Completed Two Sets of STIS/CCD 8091 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal Continuation

       The Space Telescope Imaging Spectrograph (CCD) was used to make high
galactic latitude, non-scripted, parallel observations.  The observations
were completed as planned, and no anomalies were noted.

   1.9 Completed STIS/CCD 7464 (The Evolution of Massive Stars as a
Function of Metallicity: Closing the Loop Observationally)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of the giant OB class star M-33-OB4-14 which is located in the
M-33 galaxy.  The galaxies of the Local Group provide the laboratories for
testing how massive stars evolve as a function of metallicity.  A
wavelength calibration image was also taken.  The observations were
executed as scheduled, and no anomalies were noted.

   1.10 Completed WF/PC-2 6354 (Measuring Luminosity Evolution in Z = 0.3
Field Galaxies)

       The WF/PC-2 was used to make snapshot observations of the galactic
cluster Gal-Cluster-1731 located at a distance of Z = 0.3.  The targets
were drawn from a much larger pool of galaxies for which the internal
kinematics have been measured from an extensive ground based program.  The
observations were executed as scheduled, and no anomalies were noted.

   1.11 Completed STIS/CCD 7356 (Intrinsic UV and X-ray Absorption in QSOs)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of the quasi-stellar source (QSO) and radio galaxy 3C288-1.
Intrinsic ultraviolet absorption lines in QSOs could identify ubiquitous
and relatively massive gas components near QSOs.  The observations were
completed as planned, and no anomalies were reported.

   1.12 Completed WF/PC-2 6967 (Blue Continuum Snapshots of 3CR Radio -
Continued Galaxies)

       The WF/PC-2 was used to make observations of the radio galaxy
3C194.0.  Radio galaxies are an important class of extragalactic objects:
they represent one of the most energetic astrophysical phenomena.  They may
be used as probes of their environments; and they are unique probes of the
early Universe.  The observations were completed as planned, and no
problems were reported.

   1.13 Completed STIS/CCD/MA1 7292 (Measurement of the Cosmological Baryon
to Photon Ratio)

       The Space Telescope Imaging Spectrograph (CCD and MA1) was used to
make observations of PG1718+481 in order to study its cosmological barion
to proton ratio.  The primordial D/H ratio is the most sensitive measure of
the baryon to photon ratio, a fundamental cosmological number with
wide-ranging uses.  A wavelength calibration image was also taken.  The
observations were completed as planned, and no problems were reported.

2.0 FLIGHT OPERATIONS SUMMARY

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 9
                                        Successful : 9

       As documented in HSTAR 6897, the acquisition at 013/075834Z
defaulted to fine lock backup on FGS-3 only when FGS-1 did not acquire.
Two observations described in tomorrow's report, WF/PC-2 6556 and STIS
7948, may have been affected.

                          Scheduled Reacquisitions : 8
                                        Successful : 8

   2.2 FHST Updates:

                              Scheduled : 18
                             Successful : 16

       The full maneuver updates using FHSTs 1 and 3, scheduled at
013/073009Z and at 013/073254Z, failed completely.  HSTAR 6896 was written.
The subsequent acquisition resulted in fine lock backup on one FGS only.

   2.3 Operations Notes:

        Using ROP SR-1, the SSR EDAC error counter was cleared twice.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH