HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1511

PERIOD COVERED:  0000Z (UTC) 11/03/95 - 0000Z (UTC) 11/06/95

Daily Status Report as of 310/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Two Sets of GHRS/2 6249 (Observations of Interstellar =
Oxygen)

       The High Resolution Spectrograph (Side Two) was used to make =
spectrographic observations of stars HD36486 and HD47839 in order to study =
interstellar oxygen in the line of sight to these stars.  It was found =
previously that the oxygen abundance in the direction of Orion is only =
half of the solar abundance.  During the second iteration of this =
proposal, at 309/022955Z, the onboard target acquisition was interrupted =
by a status buffer error message indicating the the number of fine =
corrections during the iterative X-null balancing exceeded the maximum.  =
This event was recorded in HSTAR 5355.  Otherwise, the observations were =
completed as scheduled, and no further anomalies were noted.

   1.2 Completed Two Sets of WF/PC-2 5957 (Snapshot of 3CR Radio Galaxies)

       The WF/PC-2 was used to make observations for radio galaxies =
3C219.0 and 3C169.1 to study the morphology of the radio galaxies.  The =
observations were executed as scheduled, and no anomalies were noted.

   1.3 Completed FGS 6241 (Companion to W922 (GL831))

       The FGSs were used in both the POS and TRANS Modes to make =
astrometric observations of star W922 (aka, Gleise 831) to measure its =
parallax and looking for possible companions.  Several other reference =
stars were also observed.  The observations were completed as planned, and =
no problems were reported.

   1.4 Completed WF/P-2 6254 (GTO Pure Parallel Program - Cycle 5)

       The WF/PC-2 was use to make random long exposures of high galactic =
fields taken in parallel with the prime science observations to obtain a =
random sample of galaxies.  The observations were executed as scheduled, =
and no anomalies were noted.

   1.5 Completed FGS 6262 (High Speed Astrometry - Barnard's Star)

       The Fine Guidance Sensors were used to make high speed astrometric =
observations of Barnard's Star and several reference stars.  The =
observations were executed as scheduled, and no anomalies were noted.

   1.6 Completed WF/P-2 6254 (GTO Pure Parallel Program - Cycle 5)

       The WF/PC-2 was use to make random long exposures of high galactic =
fields taken in parallel with the prime science observations to obtain a =
random sample of galaxies.  The observations were executed as scheduled, =
and no anomalies were noted.

   1.7 Completed WF/PC-2 5937 (A Gravitational Lens Telescope: Lyman-Alpha =
Imagery of Q2237+0305)

       The WF/PC-2 was used to make Lyman-Alpha red shifted imaging =
observations of the gravitational lens Q2237+0305 (aka, Einstein's Cross =
Gravitational Lens system).  The lensing galaxy will literally be used as =
a telescope to study to morphology of the emission-line region of this =
quasar.  The observations were executed as scheduled, and no anomalies =
were noted.

   1.8 Completed FGS 6036 (Detection and Mass Determination of Low Mass =
Companions to nearby M Dwarf)

       The FGSs were used in both the POS and TRANS Modes to make =
astrometric observations of low mass companions to M class dwarf star =
GL791 and four reference stars.  This will lead to a mass determination =
for the stars.  The observations were completed as planned, and no =
anomalies were noted.

   1.9 Completed WF/PC-2 6253 (Pure Parallel Archive Program)

       The WF/PC-2 was used to execute a pure parallel program taking =
ultraviolet observations running concurrent with prime science =
observations.  The intent is to search for extra-galactic sources with =
flux excesses at 3000 A0 and galactic sources with excesses at 1600 A0.  =
The observations were completed as planned, and no problems were reported.

   1.10 Completed WF/PC-2 6250 (WF/PC-2 Cycle 5 Calibration: Internal =
Monitor)

       The WF/PC-2 was used to make a series on internal calibration =
observations.  Internal flats, biases, and K-Spot calibration images were =
taken.  These observations are designed to monitor the health of the =
cameras.  The observations were executed as scheduled, and no anomalies =
were noted.

   1.11 Completed FOC/96 6113 (Searching for Low Mass Stars: The Mass =
Function )

       The Faint Object Camera (f/96) was used to make observations of =
globular cluster NGC-6809 to search for very low mass (VLM) stars.  The =
intent is to derive the luminosity and mass functions for VLM stars.  The =
observations were completed as planned, and no problems were reported.

   1.12 Completed FOS/BL 5781 (Emission Line Variability in the Lensed =
Quasar Q0957+561: Carryover)

       The Faint Object Spectrograph (Blue side) was used to make =
observations of the lensed quasar Q0957+561(A and B) to study its emission =
line variability.  From IUE data it was found that the flux ratio, A/B =
varies significantly on a time scale of two weeks.  The observations were =
executed as scheduled, and no anomalies were noted.

   1.13 Completed Two Sets of GHRS/1 6070 (Interstellar Tin: Probing =
Galactic S-Process Element Enrichment)

       The High Resolution Spectrograph (Side One) was used to make =
Echelle A observations of stars HD47839 and HD37128 in order to probe for =
interstellar tin and to study the galactic S-process neutron capture of =
element enrichment.  The observations were completed as planned, and no =
problems were reported.

   1.14 Completed GHRS/1 5945 (Diffuse Helium Absorption as a Probe of =
Quasar History)

       The High Resolution Spectrograph (Side One) was used to make =
observations of diffuse helium absorption lines in the spectra of quasar =
Q0302-0019 to confirm the detection of intergalactic helium by the FOC.  =
The observations were completed as planned and no anomalies were reported.

   1.15 Completed FGS 6054 (FGS Observations of Halo Population Binaries)

       The FGSs were used in the TRANS mode to make astrometric =
observations of the spectroscopic binary star HD20039.  From the FGS =
scans, the separation, position angles, and magnitude difference of the =
two stars will be obtained.  The observations were completed as scheduled, =
and no problems were noted.

   1.16 Completed GHRS/2 5869 (Chromospheric Activity in Quiet stars: Halo =
Subdwarfs)

       The High Resolution Spectrograph (Side Two) was used to make =
spectrographic observations of the quiet star HD94028 to study its =
chromospheric activity.  This is a search for Mg II emission in low =
metallicity solar temperature field stars in the galactic halo.  The =
observations were completed as planned, and no problems were reported.

   1.17 Completed WF/PC-2 5906 (Star Counts and Color-Magnitude Diagrams =
of Four Bright Globular Cluster)

       The WF/PC-2 Camera was used to make multi-color images (V and I =
Bands) of a globular cluster located in the Andromeda Galaxy (M-31) in =
order to make a color-magnitude diagram of the cluster.  The observations =
were executed as scheduled, and no anomalies were noted.

   1.18 Completed WF/PC-2 6129 (The Structure, Polarization, and Evolution =
of the Crab Synchrotron Nebula)

       The WF/PC-2 was used to make observations of the area near =
Crab-Pulsar (M-1) in order to study its structure, polarization, and =
evolution.  Two color and polarization images were made.  The observations =
were executed as planned, and no anomalies were reported.

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

       The WF/PC-2 was used to make observations of the galaxy NGC-2541 =
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.

   1.20 Completed WF/PC-2 5949 (High Resolution Imaging of Galaxies =
Responsible for QSO Lyman Alpha Absorption.)

       The WF/PC-2 was used to make high resolution observations of Field =
0531 in order to study galaxies which are responsible for intermediate =
redshift QSO Lyman Alpha absorption.  It is the extended gaseous region =
around these galaxies that produces the absorption.  The observations were =
executed as scheduled, and no anomalies were noted.

   1.21 Completed WF/PC-2 5353 (Low-Mass Binaries in the Hyades: Cycle 4 =
High)

       The WF/PC-2 was used to make images of the low-mass, late M-Class =
dwarf star RHY080 which is located in the Hyades cluster.  Some of the =
companion stars may be brown dwarfs.  The observations were completed as =
scheduled, and no problems were reported. 

   1.22 Completed WF/PC-2 5978 (Host Galaxy of Distant Radio Quasars)

       The WF/PC-2 was used to make observations of the host galaxy of =
distant radio-loud quasar QSO-1048+3.  The observations were executed as =
scheduled, and no anomalies were noted.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 21
                                        Successful : 21

       An acquisition at 310/012655Z failed to fine lock back up on FGS-3 =
only.  HSTAR 5356 was written to document this event.

                          Scheduled Reacquisitions : 25
                                        Successful : 25

   2.2 FHST Updates: 

                              Scheduled : 46
                             Successful : 46

   2.3 Operations Notes: 

       While analyzing data last week, it was discovered that on =
303/041700Z, during a slew from 78.45 degrees to 69.0 degrees, the + wing =
overshot the destination position by 3.5 degrees.  The profile of the slew =
indicates a possible low-order bit upset.  Dornier is reviewing the data.  =
The event is being tracked on HSTAR 5351.

       During the weekend, there was one instance of engineering data loss =
during STGT operations due to NASCOM problems.  A TTR was written.

3.0 SIGNIFICANT FORTHCOMING EVENTS: 

        Nothing at this time.

/DMH
                     -END-