HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2321

PERIOD COVERED:  0000Z (UTC) 02/03/99 - 0000Z (UTC) 03/04/99

Daily Status Report as of 063/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed 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.

   1.2 Completed Two Sets of 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 Two Sets of WF/PC-2 8391 (Calibration of the MOC on MGS)

       The WF/PC-2 was used to make images of the planet Mars.  WF/PC-2
images of Mars obtained during the first week of March 1999 will be used to
help establish the absolute calibration of the Mars Orbiter Cameras {MOC}
on the Mars Global Surveyor {MGS}.  The observations were completed as
scheduled, and no anomalies were reported.

   1.4 Completed STIS/CCD 8080 (STIS Spectroscopic CCD Flatfielding --
Revised)

       The Space Telescope Imaging Spectrograph (CCD) was used to make CCD
flat fielding calibration observations in the spectroscopic mode.  The
observations were completed as planned, and no anomalies were reported.

   1.5 Completed STIS/MA1 7950 (Cycle 7 MAMA Dark Measurements)

       The Space Telescope Imaging Spectrograph (MA1) was used to make a
dark calibration image.  This is to establish if the detectors are
performing nominally, that no internal movement of the MCP has taken place,
and establish dark level in orbit for a given operating temperature.  These
darks will be used in later image reduction and also trended over
instrument life time as indicators of detector degradation or damage.  The
observations were completed as planned, and no problems were reported.

   1.6 Completed STIS/CCD 7361 (The Nature of Nuclear Activity in Nearby
Galaxies)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of the nuclear region of galaxies N138 and N4800.  The high
resolution spectra will be used to search for broad components in H-Alpha
and for velocity gradients, indicative of gas rotation or other ordered
motions.  The observations were executed as scheduled, and no anomalies
were noted.

   1.7 Completed Four Sets of WF/PC-2 8090 (POMS Test Proposal: WF-II
Parallel Archive Proposal Continuation)
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       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.

   1.8 Completed WF/PC-2 7431 (Snapshot Survey of Microlensed Source Stars)

        The WF/PC-2 was used to make snapshot survey images of microlensed
source star MACHO-96-B.  Gravitational microlensing surveys have revealed
an excess of lensing events over theoretical predictions toward both the
Large Magellanic Cloud and the Galactic Bulge.  The observations were
completed as planned, and no anomalies were reported.

   1.9 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
3C250.0.  Radio galaxies are an important class of extragalactic objects:
they represent one of the most energetic astrophysical phenomena and they
may be used as probes of their environments.  They are unique probes of the
early Universe.  The observations were completed as planned, and no
problems were reported.

   1.10 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.

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

       The Space Telescope Imaging Spectrograph (CCD and MA1) were used to
make observations to study the morphological and spectral evolution of the
galaxies 3C63.2 .  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.

   1.12 Completed WF/PC-2 7615 (Determination of the Mass Function of a
Globular Cluster Through Gravitational Microlensing)

       The WF/PC-2 was used to make gravitational microlensing observations
of the large globular cluster NGC-6656 located in Sagittarius in order to
study its mass function.  Gravitational microlensing offers a unique and
direct method of determining the masses of stars and other compact objects
down to planetary masses.  A bias and dark calibration observations were
also taken.  The observations were completed as planned, and no problems
were reported.

   1.13 Completed WF/PC-2 7386 (A Snapshot Survey of Nova Shells)

       The WF/PC-2 was used to make observational images of the super nova
shell V827-Her in order to detect and measure its expanding gaseous shell.
These observations will trace the distribution of hot and cool gas in the
nova shells, and show their degree of inhomogeneity on both large and small
scales.  The observations were completed as scheduled, and no problems were
noted.

   1.14 Completed STIS/CCD/MA1 7438 (Spatially-Resolved Spectroscopy of the
UVX in Elliptical Galaxies)

       The Space Telescope Imaging Spectrograph (CCD and MA1) was used to
make spatially resolved far-ultraviolet observations of the large
elliptical galaxy NGC-5831.  The prominent far-UV upturn {UVX} in the
spectra of elliptical galaxies originates from stars in their old
populations which have evolved beyond the He-flash at the tip of the red
giant branch.  A wavelength calibration image was also taken.  The
observations were completed as scheduled, and no anomalies were reported.

2.0 FLIGHT OPERATIONS SUMMARY

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 9
                                        Successful : 9

                          Scheduled Reacquisitions : 9
                                        Successful : 9

   2.2 FHST Updates:

                              Scheduled : 17
                             Successful : 17

   2.3 Operations Notes:

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

       An SI C&DH error was reset per ROP NS-5.

       HST real-time operations reconfigured from PRS to CCS "A" String at
062/1604Z.

       The Gyro-3 drift rate bias trend data shows a decrease sine the last
report.  The rate of change over the last two day has been 21.18
arcseconds/hour/day (was 29.16 arcseconds/hour/day).

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH