HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2317

PERIOD COVERED:  0000Z (UTC) 02/25/99 - 0000Z (UTC) 02/26/99

Daily Status Report as of 057/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Recovery and SMS Science Intercept

        Recovery from Safemode Inertial Hold was initiated and the SMS was
sucessfully started at 056/0500Z. The science observations started at
056/1103Z.

   1.2 Completed STIS/CCD/WF/PC-2 7367 (Multi-Wavelength Imaging of
Circumstellar Disks in the Orion Nebula)

       The Space Telescope Imaging Spectrograph (CCD) and the WF/PC-2 were
used to make multi-wavelength imaging of circumstellar disks (NGC-1976)
seen as silhouettes against the bright emission-line background in the
Orion Nebula.  With these data one should be able to examine the radial
structure of the disks in great detail, and over a wide spatial extent.
The observations were completed as planned, and no problems were reported.

   1.3 Completed WF/PC-2 7278 (The Connection Between The Obscuring Torus
and the Masing Disk in H_20 Me)

       The WF/PC-2 was used to investigate the connection between the
molecular torus and the emission line gas in the H-2 megamaser NGC-1386.
The proposal completed nominally with no reported problems.

   1.4 Completed STIS/CCD 7912 (STIS Parallel Archive Proposal - Nearby
Galaxies - Imaging and Spectroscopy)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
parallel observations of nearby galaxies.  This survey will be useful to
study the star formation histories, chemical evolution, and distances to
these galaxies.  These data will be placed immediately into the Hubble Data
Archive.  The observations were completed as scheduled, and no problems
were reported.

   1.5 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.

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

       The Space Telescope Imaging Spectrograph (CCD) and the WF/PC-2 were
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 a dark calibration observation were also taken.  The
observations were completed as planned, and no problems were reported.

   1.7 Completed WF/PC-2 7465 (White Dwarf Distance and Precision Age for
Globular Clusters)

       The WF/PC-2 was used to make observations of white dwarf star
WD1713+659 which is located in globular cluster 47-Tuc.  The observed
cooling sequences for the clusters is to be fit to the corresponding FCSs
(Fiducial Cooling Sequences) to determine accurate cluster distance moduli
and absolute ages.  The observations were executed as scheduled, and no
anomalies were noted.

   1.8 Completed STIS/CCD/MA2 7290 (C-IV In Extensive Gaseous Halos of QSO
Lyman-Alpha Absorbing Galaxies)

       The Space Telescope Imaging Spectrograph (MA2) was used to make
observations of the QSO, Lyman-Alpha, absorbing galaxy PKS0405-12.
Detection of absorption features would imply that the halo gas of this
galaxy has been enriched by some sort of galactic fountain (in place of a
halo star formation) and would also determine up to which radius this
process has operated.  A wavelength calibration image was also taken.  The
observations were executed as scheduled, and no anomalies were noted.

   1.9 Completed 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.

2.0 FLIGHT OPERATIONS SUMMARY

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 6
                                        Successful : 6

                          Scheduled Reacquisitions : 10
                                        Successful : 10

   2.2 FHST Updates:

                              Scheduled : 16
                             Successful : 16

   2.3 Operations Notes:

       Using ROP SR-1, the SSR EDAC error counter was reset once.

       The SSA transmitter was turned on and off per ROP IC-2.

       Gyro-3, which is currently operating in the shadow mode, had a
saturation error at 057/041630Z for one 12-second sample during a T2 slew
and near a night/day transition.  HSTAR 7018 was written.  The Gyro-3 drift
rate bias trend data shows another decrease.  The rate of change over the
last two days is 30.89 arcseconds/hour/day (was 34.49).  the trend still
exceeds the desired 10.8 arcseconds/hour/day.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH