HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1684

PERIOD COVERED:  0000Z (UTC) 07/26/96 - 0000Z (UTC) 07/29/96

Daily Status Report as of 211/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed GHRS/1/2 6665 (Galaxy Rotation Curves at Large Radius =
Using Lyman-Alpha Absorption Line)

       The High Resolution Spectrograph (Both Sides One and Two) was used =
to make spectrographic observations of the background QSO PG13099+355 =
through the disk of two foreground spiral galaxies in order to obtain the =
galaxy's rotation curve by studying the structure of the Lyman-Alpha =
lines.  The observations were executed as scheduled, and no anomalies =
were noted. 

   1.2 Completed FOS/BL 6166 (FOS Cycle 5: Location of Spectra and =
Wavelength Calibration)

       The Faint Object Spectrograph (Blue Side) was used to make =
wavelength calibration images to measure the stability of the FOS Blue =
Side wavelength scale and spectral locations.  A Taled calibration =
observation was also taken.  The observations were completed as planned, =
and no anomalies were reported.

   1.3 Completed FOS/BL 6663 (Systematic Investigation of C/1995 01 =
(Hale-Bopp))

       The Faint Object Spectrograph (Blue Side) was used to make =
observations of the comet Hale-Bopp (aka, comet C/1995-01) as part of a =
systematic investigation of the comet.  The comet is being monitored over =
a wide range of heliocentric distances.  These data at different =
distances will provide unique information the sublimation behavior of the =
material in this comet.  The observations were completed as planned, and =
no problems were reported. 

   1.4 Completed Two Sets of WF/PC-2 6903 (WF/PC-2 Cycle 6 Calibration: =
Decontamination)

       The WF/PC-2 was used to make several calibration bias =
observations, internal flats, K-Spot images and dark calibration images =
which are all part of a Cycle 6 decontamination procedure.  No science =
was interleaved with the dark exposures.  The observations were completed =
as scheduled, and no problems were reported.

   1.5 Completed Two Sets of FOS/RD 6204 (FOS Cycle 5 Internal/External =
Offset)

       The Faint Object Spectrograph (Red Side) was used to make =
spectrographic calibration images of the objects NGC-6833 and HD207757 in =
order to measure the spectrograph's internal and external offsets.  The =
internal lamp was intermingled with the external observations.  During =
the second iteration of this proposal, between approximately 210/1435Z =
and 210/1510Z, there were repeated losses of FGS lock which, in turn, =
caused an FOS target acquisition failure.  These events are documented in =
HSTAR 1996.  Otherwise, the observations were completed as planned, and =
no further problems were reported.

   1.6 Completed Two Sets of FOC/96 6349 (Snapshot search for High Redshif=
t QSOs with Far-UV Flux)

       The Faint Object Camera (f/96) was used to make snapshot images of =
the quasi-stellar objects Q1158-187 and Q0109-353.  This is to determine =
if these high redshifted objects have a far ultraviolet flux.  The =
observations were executed as scheduled, and no anomalies were noted.

   1.7 Completed FGS 6885 (L726-8/ UV-Ceti)

       The FGSs were used in both the POS and TRANS modes to make =
astrometric observations of the star UV-Ceti.  This is to look for short =
period, low mass companions in orbit around the star.  The observations =
were completed as planned, an no anomalies were reported.

   1.8 Completed FGS 6270 (The Parallax of RW Tri)

       The FGS were used in the POS Mode to make astrometric observations =
of old nova RW Tri and several other reference stars to measure its =
parallax.  The observations were completed as planned, and no anomalies =
were noted.

   1.9 Completed FOS/BL 6476 (A Study of Curcumstellar Material Formed in =
a Hydrogen-Deficient Environment)

       The Faint Object Spectrograph (Blue Side) was used to make low =
resolution ultraviolet spectral observations of the hot variable CrB-type =
star V348-SGR in order to study the curcumstellar material formed in its =
hydrogern-defecient environment.  The objective is to study the newly =
formed dust associated with the brightness changes. The observations were =
completed as planned, and no problems were reported.

   1.10 Completed FGS 6049 (Monitoring the Size and Shape of Mira Type =
Stars)

       The FGSs were used to make astrometric observations of the Mira =
class star HD120285 in order to study its size and shape during different =
phases of its pulsation cycle.  The observations were completed as =
planned, and no anomalies were reported.

   1.11 Completed FOS/BL 6470 (Decoding the Inner Disk About =
Beta-Pictoris)

       The Faint Object Spectrograph (Blue Side) was used to make =
ultraviolet spectrographic observations of the disk around the star Beta =
Pictoris (aka, HD50241) looking for emission lines arising in the inner =
disk.  The objective is to ascertain the composition of the inner disk.  =
The observations were completed as planned, and no problems were =
reported. 

   1.12 Completed FOS/RD 6925 (FOS Observations of Solar Analog =
Standards)

       The Faint Object Spectrograph (Red Side) was used to make absolute =
spectrophotmetry observations of the solar analog star P303E-Cali in the =
spectral range of 2200 A0 to 8500 A0.  The objective is to provide the =
primary standards for the absolute calibration of the NICMOS.  The =
observations were completed as scheduled, and no problems were reported.

   1.13 Completed WF/PC-2 6717 (UV Spectroscopy of the Luminous Cooling =
Flow Nebula in A2597)

       The WF/PC-2 was used to make ultraviolet observations of the =
nuclear regions within the luminous, cooling flow,  nebula A2597.  The =
observations were completed as planned and no problems were reported. 

   1.14 Completed FOS/RD 6548 (The Cool Interstellar Medium in Hot =
Cluster of Galaxies)

       The Faint Object Spectrograph (Red Side) was used to make =
ultraviolet resonance absorption line observations of quasar QSO0107-15 =
in order to study the cool interstellar medium within a cluster of =
galaxies which lie within the line of sight to the quasar.  The QSO is =
being used a probe of the galactic cluster.  The observations were =
executed as scheduled, and no anomalies were noted. 

   1.15 Completed WF/PC-2 6902 (WF/PC-2 Cycle 6 Photometric Calibration =
Monitor UV/OPT STD)

       The WF/PC-2 was used to make both ultraviolet and optical =
photometric observations of the standard star GRW+70D582 as part of a =
Cycle 6 calibration procedure.  This observation was done immediately =
before and after decontamination procedures.  The observations were =
completed as planned, and no problems were reported. 

   1.16 Completed FOS/RD 6595 (Does Pluto Have a Haze Layer?)

       The Faint Object Spectrograph (Red Side) was used to make =
spectrographic observations of the planet Pluto in order to determine if =
the planet has a haze layer.  These observations were made during a =
series of stellar occultations.  The objective is to study the physical =
structure of the atmosphere at kilometer-level spatial resolution.  The =
observations were executed as scheduled, and no anomalies were noted. 

   1.17 Completed FOS/RD 6585 (UV Spectra of Representative Stellar =
Populations of Age > 2)

       The Faint Object Spectrograph (Red Side) was used to make =
mid-ultraviolet spectrographic observations of nuclear region of nearby =
galaxy NGC-5831.  This galaxy has a relatively old stellar population.  =
The objective is to fill in crucial gaps in our understanding of stellar =
populations, and thus aid in the modeling of galactic evolution.  The =
observations were completed as planned, and no anomalies were reported.

   1.18 Completed FGS 6641 (Continuation of Mass Ratio Determination for =
Double Stars)

       The Fine Guidance Sensors were used in both the POS and TRANS =
modes to make astrometric observations of the double star L722-22 in =
order to determine the mass ratio of its two components.  This binary =
system contains either a low-mass star or a brown dwarf.  The =
observations were executed as scheduled, and no anomalies were noted.

   1.19 Completed 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 galaxy CL-ULIR234.  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.

   1.20 Completed WF/PC-2 6348 (Blue Continuum Snapshots of 3CR Radio =
Galaxies)

       The WF/PC-2 was used to make some snapshot images of the blue =
continuum in radio galaxy 3C2.0. Combined with existing data, these =
exposures will provide high spatial resolution information on the color =
distribution within galaxies, redding due to dust, spacial indices of the =
optical synchrotron jets, and colors of the active nuclei and tidal jets. =
 The observations were executed as scheduled, and no anomalies were =
noted.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 22
                                        Successful : 22

       As more completely described in 1.5, there were numerous losses of =
lock during the interval 210/1435-1510Z.

                          Scheduled Reacquisitions : 22
                                        Successful : 22

   2.2 FHST Updates: 

                              Scheduled : 39
                             Successful : 39

   2.3 Operations Notes: 

       All science data was collected from the previous week's =
observations.  Most TDRSS services were manually scheduled.

3.0 SIGNIFICANT FORTHCOMING EVENTS: 

        Nothing at this time.

/DMH