HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2306

PERIOD COVERED:  0000Z (UTC) 02/10/99 - 0000Z (UTC) 02/11/99

Daily Status Report as of 042/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Three 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.

   1.2 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.

   1.3 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.  A
wavelength calibration observation was also taken.  The observations were
completed as planned, and no problems were reported.

   1.4 Completed WF/PC-2 6604 (Photometry of the Oldest Field Population in
the Magellanic Clouds.)

       The WF/PC-2 was used to make both visual and inferred photometric
observations of selected stars in the oldest field in the Large Magellanic
Cloud SMC-004900.  From these data, the ages and population densities of
the cluster will be measured.  The observations were completed as
scheduled, and no problems were noted.

   1.5 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.

   1.6 Completed Three 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.

   1.7 Completed STIS/CCD/MA1/MA2 7389 (Chromospheres and Transition Layers
in Hyades and Pleiades F Stars)

       The Space Telescope Imaging Spectrograph (CCD, MA1 and MA2) was used
to make observations of the F class star HD27848 which is located in the
Hyades star cluster.  This proposal seeks to obtain additional empirical
constraints on the heating mechanisms for stellar chromospheres, transition
layers and coronae.  A wavelength calibration obseration was also taken.
The observations were completed as planned, and no problems were reported.

   1.8 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.

   1.9 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 V419-Aql 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.

   1.10 Completed WF/PC-2 6657 (Resolving the Shocks in Powerful Radio
Galaxies)

       The WF/PC-2 was used to make observations of the powerful radio
galaxy 3C171 in order to try to find the optical counterpart of its jets.
It is clear that jet/cloud interactions play an important role in defining
the morphology, kinematics and ionization of the extended gas in active
galaxies, we are still far from understanding the physical mechanisms
involved.  The observations were executed as scheduled, and no anomalies
were noted.

2.0 FLIGHT OPERATIONS SUMMARY

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 10
                                        Successful : 9
                          Scheduled Reacquisitions : 9
                                        Successful : 7

       The acquisition scheduled for 042/072842Z failed when the search
radius for FGS-1 exceeded the search radius limit.  HSTAR 6985 was written.
The re-acquisitions at 042/0900Z and at 042/1036Z also failed for the same
reason.  Two proposals, STIS 7744 and WF/PC-2 8090, which occur during the
period of the next report were affected.  A resultant STIS error flag was
cleared via ROP NS-12 at 043/0754Z.

   2.2 FHST Updates:

                              Scheduled : 15
                             Successful : 15

   2.3 Operations Notes:

       The SSR EDAC error counter was cleared twice using ROP SR-1.

       The Gyro-3 drift rate bias has shown slight improvement over the
last several days to an average of 37.65 arsec/hour per day, still well
above the desired 10.8 arcsec/hour per day.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH