HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2099

PERIOD COVERED:  0000Z (UTC) 04/09/98 - 0000Z (UTC) 04/10/98

Daily Status Report as of 100/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Two 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 with no
anomalies.

   1.3 Completed STIS/CCD 7911 (STIS Galactic Plane Pure Parallel Program)

       The Space Telescope Imaging Spectrograph (CCD) was used to make low
galactic latitude survey observations in parallel with the prime science
observations.  Short exposures with the 50CCD imaging mode will provide the
wavelength zero-point calibration.  These data will be placed immediately
into the Hubble Data Archive.  The observations were executed as scheduled,
and no anomalies were noted.

   1.4 Completed STIS/CCD 7803 (Daily Darks to Update Acquisition Bad Pixel
Table Part III)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
daily dark calibration updates.  These daily darks are intended to identify
hot pixels for update to the acquisition on-board FSW hot pixel table.
Daily hot pixel lists can also be used for science data analysis.  The
observations were completed as planned, and no anomalies were reported.

   1.5 Completed FGS 7485 (Dynamical Masses for the Stars in the
Pre-Main-Sequence Spectroscopic Binary 045251+3016)

       The Fine Guidance Sensors were used to make astrometric observations
of the pre-main-sequence, spectroscopic, binary STAR-04560 in order to
obtain its dynamic mass.  An excellent single-lined spectroscopic orbit is
already completed, which provides all of the essential orbital elements
except inclination angle and mass ratio.  The observations were executed as
scheduled, and no anomalies were noted.

   1.6 Completed Four 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.

   1.7 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.

   1.8 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.

   1.9 Completed FGS 7492 (The Distances to Dwarf Novae, and the
Calibration of the Technique of Infrared Spectroscopic Parallax)

       The Fine Guidance Sensors was used to make astrometric observations
of the dwarf nova U-Gem and several other reference stars.  The distances
to dwarf novae are poorly known.  The distance to the object can be
measured using a technique of infrared spectroscopic parallax.  The
observations were completed as scheduled with no anomalies.

   1.10 Completed Two Sets of NIC/1/2/3 7505 (The Hubble Diagram for
Distant Supernovae Measuring Cosmic Deceleration and Global Curvature)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of Super Nova SN1998E in order to produce a precise
Hubble diagram from measuring cosmic deceleration and global curvature.
HST can make an essential contribution by providing photometry with
substantially higher precision and better temporal coverage than can be
obtained from the ground.  The observations were completed as planned, and
no anomalies were reported.

   1.11 Completed Three 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.

   1.12 Completed Three Sets of NIC/2 7233 (Dust Disks Around Main Sequence
Stars)

       The Near Infrared Camera (Camera Two) was used to make observations
of the dust disk around main sequence stars.  The observations were made
with the coronagraph to minimize the effects of glare from the bright
central star.  A dark calibration image was also taken.  The observations
were completed as scheduled, and no anomalies were reported.

   1.13 Completed WF/PC-2 7627 (WF/PC-2 Cycle 7 Astrometric Monitor)

       The WF/PC-2 was used to make observations of the large globular
Cluster Omega Cen as part of a Cycle 7 astrometric monitor and calibration
of the CCDs.  This program will verify accuracy and stability of geometric
transformation and relative astrometry solution.  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 : 8

                          Scheduled Reacquisitions : 6
                                        Successful : 6

   2.2 FHST Updates:

                              Scheduled : 18
                             Successful : 18

   2.3 Operations Notes:

       Using ROP SR-1, the EDAC counter was cleared at 099/1838Z.

       ESTR-2R reconditioning was completed at 100/0655Z as directed by ROP
RD-7.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH