HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2309

PERIOD COVERED:  0000Z (UTC) 02/15/99 - 0000Z (UTC) 02/16/99

Daily Status Report as of 047/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed WF/PC-2 6353 (A Snapshot Emission Line Imaging Survey of
Very Low Excitation Planetary Nebulas)

       The WF/PC-2 was used to make snapshot observations as part to an
emission line survey of the very low excitation planetary nebula PK082+11D1
(Class PNe).  This target was selected based on the O III/H alpha line flux
ratio.  The observations were executed as scheduled, and no anomalies were
noted.

   1.2 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.

   1.3 Completed STIS/CCD/MA2 7348 (Boron in the Extreme Pop II Star HD
140283)

       The Space Telescope Imaging Spectrograph (CCD and MA2) was used to
make observations of the extreme POP II dwarf class star HD140283.  Using
the HST and ground-based observations it has been determined that there is
an abundances of boron and beryllium in this star.  A wavelength
calibration image was also taken.  The observations were executed as
scheduled, and no anomalies were noted.

   1.4 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.

   1.5 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.

   1.6 Completed 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 galaxy UGC-5467 (taken from a list of 150 galaxies) in order to
study its 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 STIS/CCD 8081 (STIS CCD Hot Pixel Annealing [2- II)

       The Space Telescope Imaging Spectrograph (CCD) was used to make a
dark and a bias calibration observation.  The effectiveness of the CCD hot
pixel annealing process is assessed by measuring the dark current behavior
before and after annealing and by searching for any window contamination
effects.  The observations were executed as scheduled, and no anomalies
were noted.

   1.8 Completed WF/PC-2 7475 (The Chemical Content of the Universe at Z< 1.6)

       The WF/PC-2 was used to make observations of the background quasar
Field-Q045.  Damped Lyman-Alpha absorption systems provide a means of
directly probing the chemical content of the deep universe.  A wavelength
calibration image was also taken.  The observations were completed as
planned, and no problems were reported.

   1.9 Completed FOC/96 6350 (FOC Spectroscopy of BALQSOs)

       The Faint Object Camera (f/96) was to be used to make ultraviolet
spectrographic images of BALQSO 0113-4040 which is known to show broad
emission lines from abundant ions.  This observation was lost due to the
guide star acquisition failure detailed in 2.1 and HSTAR 6999 when the take
data flag remained down.

   1.10 Completed WF/PC-2 6435 (A WF/PC-2 Search for Surviving Binary
Companions in SN Ia Remnants)

       The WF/PC-2 was used to make observations of the class Ia super nova
remnant Tycho-SNR in order to search for surviving binary companions.  The
type Ia supernovae {SNe Ia} are widely believed to be explosions of white
dwarfs undergoing binary mass accretion.  The observations were completed
as planned, and no anomalies were reported.

2.0 FLIGHT OPERATIONS SUMMARY

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 4
                                        Successful : 3

       Per HSTAR 6999, the acquisition scheduled for 046/12/1231Z failed
when the scan step limit was exceeded on FGS-3.  The proposal described in
1.9 was affected by this failure.

                          Scheduled Reacquisitions : 10
                                        Successful : 10

   2.2 FHST Updates:

                              Scheduled : 18
                             Successful : 18

   2.3 Operations Notes:

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

       A TTR was written when UPDs were no issued due to a software anomaly
at the NCC.

       The gyro-3 drift rate bias trend data shows a step shift in the bias
trend since 2/12/99.  The rate of change over the last two days is 74.83
arcseconds/hour per day, well above the desired limit of 10.8
arcseconds/hour per day.

       During the night, battery 5 temperature flagged out of limits at
047/054634.  HSTAR 7000 was written.  Later, at 047/084805Z, both the
battery 2 and the battery 4 voltages temporarily flagged out of limits, due
to the solar eclipse encountered this morning.  HSTAR 7001 was written.
This problem was corrected by disabling and then re-enabling the rate of
charge test, as directed by an operations request.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       The start of sustained CCS "A" string operations will begin this
morning at approximately 047/1448Z.

       Continuation of normal science observations and calibrations.

/DMH