HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1871

PERIOD COVERED:  0000Z (UTC) 05/05/97 - 0000Z (UTC) 05/06/97

Daily Status Report as of 126/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed WF/PC-2 6345 (Determining the Binary Frequency for
Ultra-Cool, Nearby M Dwarf Stars)

       The WF/PC-2 was used to make observations of ultra-cool, nearby, M
class dwarf star RG0050-272 to determine the frequency for them being
binary systems and to try to detect stellar and sub-stellar companions.
The observations were executed as scheduled, and no anomalies were noted.

   1.2 Completed STIS/CCD 7071 (CCD Target Centering)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of star GD153-1 in order to make calibration measurements to
center the image in the CCD.  The purpose of this proposal is to
demonstrate the ability of the STIS FSW to center (peakup) an isolated
point source within a spectroscopic slit using the CCD detector.  The
observations were completed as scheduled, and no problems were reported.

   1.3 Completed Four Sets of WF/PC-2 6909 (WF/PC-2 Cycle 6 Calibration:
Earth Flats

       The WF/PC-2 was used to make observations of the bright Earth to
obtain streak flats which are used to construct high quality flat fields
for the WF/PC-2 filter set.  The observations were executed as scheduled,
and no anomalies were noted.

   1.4 Completed Two Sets of WF/PC-2 6346 (Snapshot Survey of the
Ultraluminous IRAS Galaxy Sample-Part 1 High)

       The WF/PC-2 was used to make snapshot survey observations of the
ultraluminous IRAS galaxies QDOTULIR19 and NGWULIR140.  These data will be
searched for multiple cores, which imply a merger has occurred, and for
starburst regions.  The observations were executed as scheduled, and no
anomalies were noted.

   1.5 Completed Six Sets of STIS/CCD 7092 (CCD Dark Rate and Read Noise)

       Observations were taken to measure CCD dark current and gather data
for making super darks.  The observations were completed as planned, and no
anomalies were reported.

   1.6 Completed Six Sets of WF/PC-2 6904 (WF/PC-2 Cycle 6 Calibration: Darks)

       The WF/PC-2 was used to make a series of dark calibration images as
part of a standard calibration within Cycle 6.  This calibration procedure
is performed once per week as part of an on-going CCD calibration to be
used to monitor and characterize hot pixels.  The observations were
executed as scheduled, and no anomalies were noted.

   1.7 Completed Two Sets of WF/PC-2 6363 (The Environments and Host
Galaxies of BL-Lac Objects)

       The WF/PC-2 was used to make snapshot survey observations of BL-Lac
objects AP-Lyibrae and Mark421 in order to study their environment and
their host galaxies.  The goal is to investigate systematic trends in host
galaxy type, unusual morphological features, nearby companion galaxies,
etc.  The observations were executed as scheduled, and no anomalies were
noted.

   1.8 Completed WF/PC-2 7029 (WF/PC-2 Cycle 6/SMOV Lyman-Alpha Check-Part 2)

       The WF/PC-2 was used to make observations of the WD0310-688 in order
to obtain far-ultraviolet (Lyman-Alpha) measures of the system's
throughput.  This is to quantify any contamination of the WF/PC-2 pick-off
mirror caused by SMOV activities.  The observations were completed as
planned, and no anomalies were reported.

   1.9 Completed WF/PC-2 6554 (Extragalactic Globular Cluster Systems)

       The WF/PC-2 was used to make observations of a extragalactic
globular cluster system which is located in galaxy NGC-4494.  This is part
of a survey which will cover a range in galaxy luminosity, morphological
type, environment, galactic cluster specific frequency and Galactic cluster
mean metallicity.  The observations were executed as scheduled, and no
anomalies were noted.

   1.10 Completed WF/PC-2 5972 (Determination of the Extragalactic Distance
Scale)

       The WF/PC-2 was used to make observations of the galaxy NGC-4548,
looking for standard candle Cepheid variable stars.  The purpose of this
observations is to help estimate the Hubble constant with an accuracy of
10%.  The observations were executed as scheduled, and no anomalies were
noted.

   1.11 Completed WF/PC-2 6359 (Core Properties of the Bulges of Spiral
Galaxies)

       The WF/PC-2 was used to make snapshot survey observations of spiral
galaxy NGC-3277 in order to study its central bulge.  The aim is to
investigate the core properties, correlations with global galactic
properties, and the frequency of occurrence of multiple and/or miscentered
nuclei.  The observations were completed as scheduled, and no anomalies
were noted.

   1.12 Completed FGS 6566 (Calibrating the Mass-Luminosity Relation at the
End of the Main Sequence)

       The FGSs were used to make astrometric observations of the
components of the low-mass, binary system, star GJ1245 in order to make a
calibrations of the mass-luminosity relation at the end of the main
sequence.  The individual stars have masses of less than 0.2 solar masses.
The observations were completed as scheduled, and no problems were noted.

   1.13 Completed WF/PC-2 7553 (Pure Parallel Archive Survey II)

       WF/PC-2 parallel observations were obtained in the ultraviolet in a
search for interesting objects.  This program is designed to find
extragalactic sources with near ultraviolet excesses (3000 A0) outside the
galactic plane and far ultraviolet sources (1600 A0) in the galactic plane.
The procedure was executed as scheduled, and no anomalies were reported.

   1.14 Completed WF/PC-2 6662 (Observation of Short Timescale Variability
of the Jovian UV Aurora)

       The WF/PC-2 was used to make observations of the aurora on the
planet Jupiter in order to study its short timescale variability.  Previous
FOC and WF/PC-2 observations have shown the very complex morphological
structure of the Jovian ultraviolet aurora and its unexpectedly strong
temporal variations.  The observations were completed as planned and no
problems were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 8
                                        Successful : 8

                          Scheduled Reacquisitions : 8
                                        Successful : 8

   2.2 FHST Updates:

                              Scheduled : 17
                             Successful : 17

   2.3 Operations Notes:

       NICMOS was updated for the best PAM position at 125/1050Z.  NICMOS
PSTOL procedures were updated.  NICMOS flight software version 4.07 was
successfully installed at approximately 125/1855Z.  During a SAA event the
NICMOS NICPWR parameter flagged out of limits for the interval
126/0410Z-0412Z.

       There was a 10-minute, 15-second real-time data loss beginning at
126/1906Z (recoverable) due to currently unknown problems at WSGT.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science and SMOV operations.

/DMH