HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2132

PERIOD COVERED:  0000Z (UTC) 05/27/98 - 0000Z (UTC) 05/28/98

Daily Status Report as of 148/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Three Sets of WF/PC-2 7712 (WF/PC-2 Cycle 7 Supplemental
Darks pt2/3)

       The WF/PC-2 was used to make a series of Cycle 7 supplemental
calibration darks.  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 executed as scheduled, and no
anomalies were noted.

   1.2 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.  The observations were executed as scheduled, and no
anomalies were noted.

   1.3 Completed NIC/1/2/3 7875 (Searching for Old Stellar Populations in
Candidate Proto-Spheroidals)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations searching for old stellar populations in candidate
proto-spheroid SA57-7042.  We have compelling evidence from WF/PC-2 images
that these galaxies have optical colors gradients.  The near-infrared is
necessary, however, to reveal color gradients large enough to separate
young and old stellar populations.  Only NICMOS imaging provides enough
spatial resolution and depth to resolve these gradients.  The observations
were completed as planned, and no problems were reported.

   1.4 Completed Five 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.

   1.5 Completed Two Sets of WF/PC-2 7909 (POMS Test Proposal: WF II
Parallel Archive Proposal)

       The WF/PC-2 was used to make parallel observations as part of the
POMS test proposal.  This test proposal is designed to simulate scientific
plans.  The observations were completed as planned, and no problems were
reported.

   1.6 Completed NIC/1/2/3 7372 (Fundamental Plane, Morphology-Density
Relation, and Lensing in the z=0.83 Cluster)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of galactic cluster Gal-Clus-1.  These data will be used
to augment the HST mosaics of the clusters with extensive ground-based
spectroscopy and imaging at the Keck, MMT, NTT, and WHT telescopes.  The
observations were completed as planned, and no problems were reported.

   1.7 Completed WF/PC-2 7590 (Cosmological Parameters Omega and Lambda
From High-Redshift Type IA Supernovae)

       The WF/PC-2 was used to make observations of type 1A supernova
14H0.9Z2 in order to study its redshift.  The HST was used to make direct
measurements of the cosmological parameters Omega, Lambda, and curvature
using Type 1A supernovae as a calibrated "standard candle".  The
observations were executed as scheduled, and no anomalies were noted.

   1.8 Completed Two Sets of NIC/2/3 7907 (NICMOS Pure Parallel Winter 97-98)

       The Near Infrared Camera (Cameras Two and Three) was used to make
pure parallel spectrographic observations of sky regions when another
instrument is prime.  The observations were completed as planned, and no
anomalies were reported.

   1.9 Completed WF/PC-2 7336 (Cosmological Parameters Omega and Lambda
From High-Redshift Type Ia Supernovae)

       The WF/PC-2 was used to make observations of the high redshifted
Type Ia supernovae SN94-8H-Z0, SN91-5H-Z0 and 11H0.5Z1.  HST can make a
direct measurement of the cosmological parameters, Omega, Lambda, and
curvature, using Type Ia supernovae as calibrated "standard candles."  The
observations were executed as scheduled, and no anomalies were noted.

   1.10 Completed STIS/CCD/MA1/MA2 7673 (STIS MAMA Sensitivity and Focus
Monitor)

       The Space Telescope Imaging Spectrograph (CCD/MA1/MA2) was to be
used to make observations of standard star GRW+70D582 in order to perform a
MAMA sensitivity and focus monitoring program.  This is to monitor
sensitivity of each MAMA grating mode to detect any change due to
contamination or other causes.  As documented in HSTAR 6494 and described
in 2.1, the guide star acquisition for this proposal failed and the take
data flag remained down.

   1.11 Completed NIC/1 7867 (NICMOS Imaging of the Dusty CfA Seyfert Nuclei)

       The Near Infrared Camera (Camera One) was used to make observations
of the Seyfert Galaxy NGC-5273.  These data will allow us to determine if
the Seyfert Type 1/2 dichotomy is best explained by the unified model, the
evolutionary picture, or a combination of both of these scenarios.  The
observations were executed as scheduled, and no anomalies were reported.

   1.12 Completed NIC/2 7887 (A Survey of Gravitational Lenses as
Cosmological Tools II)

        The Near Infrared Camera (Camera Two) was used to make observations
of the gravitational lens candidate system UM425.  The propose is to extend
our IR survey of gravitational lenses and gravitational lens candidates by
obtaining NICMOS images of 14 additional lens systems or candidates.  The
observations were executed as scheduled, and no anomalies were noted.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 8
                                        Successful : 7

       The acquisition at 147/183847Z ultimately failed to RGA control due
to failed V1 FGS attitude error vector checks.  The acquisition initially
succeeded, but a subsequent loss of lock occurred.  Recovery from that
event was unsuccessful.  HSTAR 6494 was written.  The STIS proposal
described in 1.10 was affected.

                          Scheduled Reacquisitions : 7
                                        Successful : 7

   2.2 FHST Updates:

                              Scheduled : 21
                             Successful : 21

   2.3 Operations Notes:

       As a result of the acquisition failure described in 2.1, HSTAR 6495
was written, documenting three STIS status buffer error messages.  The
flags were cleared as directed by a ROP.

       The EDAC error counts were cleared at 147/1855Z, per ROP SR-1.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH