HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2143

PERIOD COVERED:  0000Z (UTC) 06/11/98 - 0000Z (UTC) 06/12/98

Daily Status Report as of 163/0000Z

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

   1.2 Completed WF/PC-2 7622 (WF/PC-2 Cycle 7 Internal Monitor)

       The WF/PC-2 was used to make a set of Cycle 7 internal monitoring
calibration measurements.  A variety of internal exposures are obtained in
order to provide a monitor of the integrity of the CCD camera electronics
in both bays {gain 7 and gain 15}, a test for quantum efficiency in the
CCDs, and a monitor for possible buildup of contaminants on the CCD
windows.  A bias calibration and an internal flat calibration image were
also taken.  The observations were executed as scheduled, and no anomalies
were noted.

   1.3 Completed Three Sets of NIC/3 7919 (NICMOS Camera 3 Campaign Snapshots)

       The Near Infrared Camera (Camera Three) was used to make images of
galaxies NGC-2989, NGC-4294 and NGC-6744 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.

   1.4 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.  As described in HSTAR 6525 and in
yesterday's report, multiple losses of lock occurred during the third
iteration of this proposal.  Otherwise, the observations were completed as
planned, and no further problems were reported.

   1.5 Completed STIS/MA2 7647 (STIS NUV-MAMA Cycle 7 Flats)

       The Space Telescope Imaging Spectrograph (MA2) was used to make
near-ultraviolet (NUV) flat calibration images.  This program will obtain
NUV-MAMA flat-field observations with the D2 lamp for the construction of
on-orbit D-flats for G230M.  A dark calibration image was also taken.  The
observations were executed as scheduled, and no anomalies were noted.

   1.6 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.  As described in HSTAR 6525 and in yesterday's
report, multiple losses of lock occurred during the second half of this
approximate four hour proposal.  Otherwise, the observations were executed
as scheduled, and no further anomalies were noted.

   1.7 Completed NIC/1/2/3 7223 (Spectrophotometry and Imaging of Pluto and
Charon)

       The Near Infrared Camera (Cameras One, Two, and Three) was used to
make observations of Charon.  Detailed spectra of the individual members of
the Pluto-Charon system are not known.  The observations were completed as
scheduled, and no problems were reported.

   1.8 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.

   1.9 Completed NIC/1/2/3 7822 (Grism Spectra of Centaurs and TNOs from
1-2 Microns)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make grism spectra of object 1995GO from 1-2 microns.  The surfaces of
Centaurs and Trans-Neptunian Objects (TNOs) contain potentially unique
records of early evolutionary processing {accretional and dynamical} in the
outer solar system.  The observations were executed as scheduled, and no
anomalies were noted.

   1.10 Completed NIC/3 7821 (SINS: The Supernova Intensive Study - Cycle
7+: Scarlet SINS)

       The Near Infrared Camera (Camera Three) was used to make
observations of the super nova LMC-SN1987 which is located in the Large
Magellanic Cloud.  Supernovae create the chemical history of the Universe,
energize the interstellar gas, and stand at the center of efforts to
understand the extragalactic distance scale.  During this proposal, the
losses of lock and late re-acquisitions described in HSTARs 6526, 6527,
6528, and 6529 (and in 2.1 below) occurred.  Four observation were
affected.  Otherwise, the observations were completed as scheduled, and no
further problems were noted.

   1.11 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.  During this proposal, the loss of lock described in HSTAR 6526
and in 2.1 occurred.  One observation was affected.  Otherwise, the
observations were completed as scheduled, and no further problems were
reported.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 6
                                        Successful : 6
                          Scheduled Reacquisitions : 9
                                        Successful : 9

       HSTAR 6526 documents a loss of lock at 162/215622Z that occurred
following a T3 slew.  The proposals described in 1.10 and 1.11 were
affected.

       HSTAR 6527 documents a loss of lock at 162/233204Z that occurred
following a T3 slew.  The proposal described in 1.10 was affected.

       HSTAR 6528 documents a late re-acquisition at approximately
163/0056Z after three attempts to acquire, and losses of lock at
163/005342Z, 163/005517Z, 163/010844Z, and 163/012128Z, the last two
following T3 slews. The proposal described in 1.10 was affected, as was an
iteration of STIS 7908 (POMS Test Proposal: STIS Non-Scripted Parallel
Proposal) which occurs in the interval of the next report.

      HSTAR 6529 documents a late re-acquisition at approximately 163/0228Z
after two attempts to acquire, and losses of lock at 163/024535Z,
163/024705Z, and 163/024915Z. The proposal described in 1.10 was affected.

       HSTAR 6530 documents losses of lock following a T3 slew at 163/0615Z
and 163/0630Z.  NIC proposal 7872 (A Morphological Census of z > 1 Cluster
Galaxies in the Optical Rest-Frame), wich occurs during the period of the
next report, was affected.

   2.2 FHST Updates:

                              Scheduled : 13
                             Successful : 12

       The roll delay update at 163/0708Z failed.  HSTAR 6531 was written.

   2.3 Operations Notes:

       Using ROP SR-1, the SSR EDAC errors were cleared at 162/1912Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH