HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2385

PERIOD COVERED:  0000Z (UTC) 06/02/99 - 0000Z (UTC) 06/03/99

Daily Status Report as of 154/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed WF/PC-2 7621 (WF/PC-2 Cycle 7 Supplemental Darks PT1/3)

       The WF/PC-2 was used to make supplemental dark calibration images.
This set of calibrations is intended to obtain 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 WF/PC-2 7387 (T-Tauri Star Snapshot Survey)

       The WF/PC-2 was used to make observations of the star V853-OPH as
part of a T-Tauri class star survey.  The observations were executed as
scheduled, and no anomalies were noted.

   1.3 Completed Two Sets of STIS/CCD 7949 (CCD Dark and Bias Monitor --
Cont. to June 99)

       The Space Telescope Imaging Spectrograph (CCD) was used to conduct a
CCD dark calibration and a bias monitoring program.  It was also scheduled
to track the growth of hot pixels on the CCD in general and within the
various target acquisition apertures specifically.  As described in
yesterday's report and HSTAR 7155, an acquisition for the second iteration
this proposal failed and the take data flag remained down, affecting one
observation at the end ot the proposal.  Otherwise, the observations were
executed as scheduled, and no further anomalies were noted.

   1.4 Completed STIS/CCD/MA1 8287 (A Search For Transparent Lines of Sight
With Intergalactic He-II Obsorption Towards 26 Bright z > 2.9 Quasars)

       The Space Telescope Imaging Spectrograph (CCD and MA1) was used to
make He-II absorption line observations of quasar HS1345+283.  The aim is
to identify more suitable bright objects for detailed studies of
intergalactic He-II absorption at a redshift of Z <2.9 and >3.2 .  A
wavelength calibration observation was also taken.  The observations were
executed as scheduled, and no anomalies were noted.

   1.5 Completed FGS 8334 (HD 98800: An Opportunity to Measure True Masses
for Low-Mass PMS Stars)

       The Fine Guidance Sensors were to be used to make astrometric
observations of the low mass pre-main sequence (PMS) star HD98800 in order
to measure its true mass.  As described in yesterday's report and HSTAR
7155, the acquisition for this proposal failed and the take data flag
remained down.

   1.6 Completed Four Sets of 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.  As described in yesterday's report and
HSTAR 7155, the acquisition for the first iteration of this proposal failed
and the take data flag remained down, affecting two observations.
Otherwise, the observations were executed as scheduled, and no anomalies
were noted.

   1.7 Completed WF/PC-2 6833 (A Cepheid Search in the Virgo Cluster Galaxy
NGC 4571)

       The WF/PC-2 was used to make observations of the Virgo Cluster
galaxy NGC-4571 in order to search for Cepheid variable stars.  The
determination of the distance to the Virgo Cluster is key to establishing
the value of the H_zero.  The observations were completed as planned, and
no problems were reported.

   1.8 Completed Four Sets of STIS/CCD 8406 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal Continuation V)

       The Space Telescope Imaging Spectrograph (CCD) was used to make high
galactic latitude observations taken in parallel with the prime science
observations as part of a POMS proposal.  This is a STIS non-scripted
parallel Condition V proposal.  The observations were completed as
scheduled, and no anomalies were reported.

   1.9 Completed WF/PC-2 7504 (Calibration of Nearby Type Ia Supernovae as
Standard Candles: The Next Three-Year Step)

       The WF/PC-2 was used to make observations of parent galaxy NGC-4527
in order to determining its Cepheid distance.  This is to continue the
calibration of the Type 1a supernova as standard candles.  The observations
were completed as planned, and no porblems were reported.

   1.10 Completed STIS/CCD 8470 (POMS Test Proposal: STIS Non-Scripted
Parallel Proposal Continuation V)

       The Space Telescope Imaging Spectrograph (CCD) was used to make high
galactic latitude observations taken in parallel with the prime science
observations as part of a POMS proposal.  This is a STIS non-scripted
parallel Condition VI proposal.  The observations were completed as
scheduled, and no anomalies were reported.

   1.11 Completed FGS 8102 (FGS Astrometry of the Extrasolar Planet of GL876)

       The Fine Guidance Sensors were used to make astrometric observations
of the extrasolar planet GL876-3-RE which is orbiting a M4 class dwarf
star.  This will help determine the planet's mass.  The observations were
completed as planned, and no problems were reported.

   1.12 Completed WF/PC-2 8210 (HST Imaging of Bi-Polar Proto-Planetary
Nebulae and Circumstellar Arcs)

       The WF/PC-2 was used to make observations of the bi-polar
proto-planetary nebula IRAS17245.  Proto-planetary nebulae provide the best
opportunity to test theories of asymptotic giant branch mass loss
{symmetric/asymmetric, continuous/episodic} and the processes which shape
planetary nebulae.  The observations were completed as planned, and no
problems were reported.

   1.13 Completed STIS/MA1 7617 (The BAL Region Covering Factor in a Sample
of IRAS-Selected QSOs - Part 2)

       The Space Telescope Imaging Spectrograph (MA1) was used to make
observations of BL-Lac/QSO object IR212-175.  This work has relevance to
investigations of QSO geometries, intrinsic QSO properties, and possible
evolutionary phenomena in QSOs.  A wavelength calibration image was also
taken.  The observations were executed as scheduled, and no anomalies were
noted.

   1.14 Completed WF/PC-2 8053 (WF/PC-2 Cycle-7 Earth Flats -- Part II)

       The WF/PC-2 was used to take Earth flat calibration images.  This
proposal obtains sequences of Earth streak flats to construct high quality
flat fields for the WF/PC-2 filter set.  The observations were executed as
scheduled, and no anomalies were noted.

   1.15 Completed WF/PC-2/STIS/CCD 7615 (Determination of the Mass Function
of a Globular Cluster Through Gravitational Microlensing)

       The WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD) were
used to make gravitational microlensing observations of the large globular
cluster NGC-6656 located in Sagittarius in order to study its mass
function.  Gravitational microlensing offers a unique and direct method of
determining the masses of stars and other compact objects down to planetary
masses.  A bias and dark calibration observations were also taken.  The
observations were completed as planned, and no problems were reported.

2.0 FLIGHT OPERATIONS SUMMARY

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 7
                                        Successful : 7

       As documented in HSTAR 7156, the acquisition at 154/032057Z
defaulted to fine lock back-up on FGS-2 only when the scan step limit was
exceeded on FGS-3.  Two proposals, STIS/WF/PC-2 7388 and WF/PC-2 8090, both
occurring during the period of the next report, may have been affected.

                          Scheduled Reacquisitions : 9
                                        Successful : 9

   2.2 FHST Updates:

                              Scheduled : 17
                             Successful : 17

   2.3 Operations Notes:

       The SSR EDAC error counter was cleared once, using ROP SR-1.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH