HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2141

PERIOD COVERED:  0000Z (UTC) 06/09/98 - 0000Z (UTC) 06/10/98

Daily Status Report as of 161/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed STIS/CCD 7926 (CCD Dark and Bias Monitor -- Continued)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
several dark and bias calibration observations.  This is 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.  These observations will also track the growth of hot pixels
on the CCD in general and within the various target acquisition apertures
specifically.  As described in HSTAR 6521 and in yesterday's report, this
proposal was affected by two losses of lock.  Otherwise, the observations
were executed as scheduled, and no further anomalies were noted.

   1.2 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.  As described in HSTAR 6521 and in yesterday's report, this
proposal was affected by three losses of lock.  Otherwise, the observations
were completed as scheduled, and no further problems were reported.

   1.3 Completed STIS/CCD 7634 (CCD Flat-Field Stability and Cosmetic
Defect Fraction)

       The Space Telescope Imaging Spectrograph (CCD) was used to
investigate and monitor the STIS CCD imaging flat-field stability and
cosmetic defects over monthly periods though out Cycle 7.  The observations
were executed as scheduled, and no anomalies were noted.

   1.4 Completed NIC/1/2/3 7872 (A Morphological Census of z > 1 Cluster
Galaxies in the Optical Rest-Frame)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of the galactic cluster containing 3C210.  Our existing
WF/PC-2 imaging of this cluster has let us study the rest-frame ultraviolet
light from these galaxies.  The proposed NICMOS imaging will allow us to
morphologically classify the cluster galaxies at rest-frame optical
wavelengths and to place them into the context of the Hubble Sequence.  As
described in HSTAR 6522 and in yesterday's report, this proposal was
affected by two losses of lock.  Otherwise, the observations were executed
as scheduled, and no further anomalies were noted.

   1.5 Completed Four Sets of STIS/CCD 7908 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
calibration observations as part of the POMS Test Proposal.  This was a
STIS non-scripted parallel proposal.  As described in HSTAR 6522 and in
yesterday's report, the secon iteration of this proposal was affected by
two losses of lock.  Otherwise, the observations were completed as planned,
and no further problems were reported.

   1.6 Completed STIS/MA2 7604 (Cycle 7 MAMA Dark Measurements)

       The Space Telescope Imaging Spectrograph (MA2) was used to make MAMA
dark measurements.  These darks will be used in later image reductions and
also trended over the instrument's life time as an indicator of the
detector's degradation or damage.  The observations were completed as
scheduled, and no problems were reported.

   1.7 Completed WF/PC-2 8049 (Long WF/PC-2 Decontaminations during 2nd
NIC/3 Campaign)

       The WF/PC-2 was used to make long decontamination procedures as part
of the second NIC/3 campaign.  Each decon is followed by five 30-minute
darks.  During this time, no external science WF/PC-2 observations were
executed.  The decontaminations were executed as scheduled, and no
anomalies were noted.

   1.8 Completed STIS/CCD 8051 (STIS Out-of-Focus PSF)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of standard source GRW+70D582 in order to study the
out-of-focus point spread function.  The observations were completed as
scheduled, and no anomalies were reported.

   1.9 Completed Two Sets of NIC/1/2/3 7871 (The Properties of High
Redshift Galaxies : A Near-Infrared Redshift Survey)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make infrared galactic survey observations of high redshifted galaxies in s
sky field designated as Field-1417.  A comparison between the population of
galaxies in the low {z<1} and high {z>2} redshift universe has shown that
the peak era of star forming activity in the universe occurs in the
redshift interval 1<z<2.  During the first iteration, there occurred the
loss of lock described in 2.1 and HSTAR 6523.  Then, during the final
iteration, there were multiple losses of lock, affecting six observations.
Otherwise, the observations were executed as scheduled, and no further
anomalies were noted.

   1.10 Completed STIS/CCD/NIC/1/2/3 7234 (Fe II AND Mg II Emission From
Redshift 4 QSOs)

       The Space Telescope Imaging Spectrograph (CCD) and the Near Infrared
Camera (Cameras One, Two and Three) were used to make observations of the
redshift 4 QSO object BR2212-162.  This QSO will be observed with both
NICMOS grisms A and B to measure the Fe II bump and both the Fe II and Mg
II 2800 A0 features, as well as the 1909 A0 C III line. The sensitivity is
adequate to measure the broad Fe II bump in one orbit per source.  The
observations were completed as planned, and no anomalies were reported.

   1.11 Completed NIC/3 7919 (NICMOS Camera 3 Campaign Snapshots)

       The Near Infrared Camera (Camera Three) was used to make images of
galaxies NGC-214, NGC-2903, NGC-4417, NGC-3115, NGC-5653 and NGC-4258 as
part of the NICMOS Camera 3 campaign snapshots.  The proposal is to obtain
wide field snapshot images of nearby galaxies in Paschen Alpha which is
inaccessible from the ground.  The observations were executed as planned,
and no anomalies were reported.

   1.12 Completed Two Sets of STIS/CCD 7908 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
calibration observations as part of the POMS Test Proposal.  This was a
STIS non-scripted parallel proposal.  The observations were completed as
planned, and no problems were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 11
                                        Successful : 11
                          Scheduled Reacquisitions : 5
                                        Successful : 5

       HSTAR 6523 documents a loss of lock at 160/0848Z during a profiled
(T3) slew.  The proposal described in 1.9 was affected.

       HSTAR 6524 ducuments multiple losses of lock beginning at
160/123000Z during profiled (T3) slews.  The proposal described in 1.9 was
affected.

   2.2 FHST Updates:

                              Scheduled : 24
                             Successful : 24

   2.3 Operations Notes:

       As indicated in yesterday's amended report, the losses of lock
mentioned in 2.1 are the last of the troublesome star/FGS-2 combination
that are scheduled to occur during the remainder of the second NICMOS
Camera Three Campaign (which concludes on day 179).

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

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH