HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2156

PERIOD COVERED:  0000Z (UTC) 06/30/98 - 0000Z (UTC) 07/01/98

Daily Status Report as of 182/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed 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 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.

   1.3 Completed Two Sets of 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.

   1.4 Completed Six 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 6938 (PSF Characterization)

       The WF/PC-2 was used to make point-spread-function (PSF) calibration
observations using the large globular cluster Omega Cen.  This is to
provide a subsampled PSF over the full field to allow PSF fitting
photometry, test PSF subtraction as well as dithering techniques {cf.
effects of the OTA breathing and CCD gain}.  The observations were executed
as scheduled, and no anomalies were noted.

   1.6 Completed Two Sets of STIS/CCD 7948 (CCD Dark and Bias Monitor --
Cont. to Dec. 98)

       The Space Telescope Imaging Spectrograph (CCD) was used to measure
CCD dark current and bias rates for the 2 supported amplifier settings
{GAIN=1 and GAIN=4} in order to gather data for making superdarks and
superbiases.  The data will be used to 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.

   1.7 Complete WF/PC-2 5993 (Dark Matter Distribution in A1689 from
gravitational lensing)

       The WF/PC-2 was used to make observations of galaxy cluster
Abell-1689-4 in order to study the distribution of dark matter in the
lensing galaxy cluster system.  This is to carry out an extensive survey of
the galaxies lying behind this cluster.  The observations were completed as
planned, and no problems were reported.

   1.8 Completed Three 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 7501 (Expansion Parallax Distances to Planetary
Nebulae)

       The WF/PC-2 was used to make parallax distance measurements of the
planetary nebula NGC-6210.  The largest impediment to our understanding of
planetary nebulae is the lack of reliable distances.  Acquired by
generalized statistical methods in all but a handful of cases, individual
PNe distances are often uncertain by factors of two or more.  The
observations were executed as scheduled, and no anomalies were noted.

   1.10 Completed NIC/1/2/3 7226 (Search for Massive Jupiters)

       The Near Infrared Camera (Cameras, One, Two, and Three) was used to
make a corographic search for massive planets around the nearby, young main
sequence star HD60934.  Because of the extreme youth of this object, any
low-mass brown dwarf and planetary companions will still be in a higher
luminosity phase and thus easily detectable.  A dark calibration image was
also taken.  The observations were executed as scheduled, and no anomalies
were noted.

   1.11 Completed NIC/1/2/3 7829 (Mapping H_2 Emission around T Tauri Stars)

       The Near Infrared Camera (Cameras One, Two, and Three) was used to
study the distribution of circumstellar dust and molecular {H_2} gas around
the classical T Tauri star HD42560 {cTTS}, probing both the near
circumstellar environment {the accretion disk} as well as the environment
further out where strong winds from these stars may be interacting with
remnants of the cloud material from which they formed.  The primary goal is
to map the distribution of the molecular gas
around cTTS.  The proposal completed nominally.

   1.12 Completed WF/PC-2 7431 (Snapshot Survey of Microlensed Source Stars)

       The WF/PC-2 was used to make snapshot survey images of microlensed
source star MOCHO-128.  Gravitational microlensing surveys have revealed an
excess of lensing events over theoretical predictions toward both the Large
Magellanic Cloud and the Galactic Bulge.  The observations were completed
as planned, and no anomalies were reported.

   1.13 Completed WF/PC-2 6856 (Early Evolution of Planetary mz-3 Nebulae)

       The WF/PC-2 was used to make observations of the MZ-3 class
planetary nebula called the Boomerang in order to study its early
evolution.  It is believed that the physical phenomena which shape the PNe
occur early in their formation history.  The observations were completed as
planned, and no problems were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 13
                                        Successful : 13

                          Scheduled Reacquisitions : 6
                                        Successful : 6

   2.2 FHST Updates:

                              Scheduled : 22
                             Successful : 22

   2.3 Operations Notes:

       Using ROP NS-1, the SSR EDAC error counter was cleared twice.

       HSTAR 6563 was written to document the fact that the NICMOS error
log wrapped around at 179/131234Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH