HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1577

PERIOD COVERED:  0000Z (UTC) 02/23/96 - 0000Z (UTC) 02/26/96

Daily Status Report as of 057/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed GHRS/1 6071 (The Temperature Structure in the Wind of the =
Pre-Main Sequence Herbig Objects)

       The High Resolution Spectrograph (Side One) was used to make =
observations of the intermediate mass, pre-main sequence Herbig object =
HD31293 (aka, AB Aurigae: Class Ae) in order to study its temperature =
structure in its wind.  This object does not have an outer convection =
zone, yet it exhibits high activity, which may be magnetic in origin.  The =
observations were executed as scheduled, and no anomalies were noted. 

   1.2 Completed WF/PC-2 6344 (Low - Mass Binaries in the Hyades - =
Completing the Survey)

       The WF/PC-2 was used to make observations of the low mass binary =
star RHY221 (M-Class Dwarf Stars) which is located in the Hyades Cluster.  =
The observations were executed as scheduled, and no anomalies were noted.

   1.3 Completed FOS/RD 6020 (SINS: Supernova Intensive Study - Cycle 5)

       The Faint Object Spectrograph (Red Side) was used to make =
spectrographic observations of the supernova remnant SN-1993J which is =
located in the Large Magellanic Cloud.  This is to study the development =
of the nova, and its interstellar matter.  The observations were completed =
as scheduled, and no anomalies were reported.

   1.4 Completed WF/PC-2 5898 (Photometry of Candidate Dwarf Spheroidal =
Galaxies in the M-81 Group)

       The WF/PC-2 was used to make two color photometric observations of =
the dwarf candidate spheroidal galaxy Gal-094447  (dSph class) which is =
located in the M-81 galactic cluster group.  The color-magnitude diagrams =
will be constructed, which will allow for the determination of various =
physical properties for the candidate dwarf spheroids.  The observations =
were completed as planned, and no anomalies were reported.

   1.5 Completed Two Sets of WF/PC-2 6358 (UV Imaging of Circumnuclear =
Starburst Rings)

       The WF/PC-2 was used to make ultraviolet snapshot observations of =
galaxies NGC-3351 and NGC-3147 in order to study their circumnuclear =
starburst rings.  A homogeneous database of properties of the star-forming =
region will be generated.  The observations were executed as scheduled, =
and no anomalies were noted.

   1.6 Completed FOS/RD 6247 (FOS Spectroscopy of Selected QSOs)

       The Faint Object Spectrograph (Red Side) was used to make =
observations of the quasi-stellar sources PG1001+054 and PG1404+226 in =
order to measure the continuum energy distribution, the emission =
intensity, and line profiles.  These quasars have exceptionally large =
values of the optical to x-ray flux ratio.  The observations were =
completed as planned, and no anomalies were noted.

   1.7 Completed Five Sets of WF/PC-2 6253 (Pure Parallel Archive Program)

       The WF/PC-2 was used to execute a pure parallel program taking =
ultraviolet observations running concurrently 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.

   1.8 Completed FOS/RD 6014 (Spectroscopic Observations of Close Binary =
T-Tauri Stars)

       The Faint Object Spectrograph (Red Side) was used to make =
observations of the variable, close binary, T-Tauri class star XZ-Tau.  =
Each component of the binary system is resolvable by the HST.  The =
observations were completed as planned, and no problems were reported.

   1.9 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.

   1.10 Completed FOS/RD 6044 (Carbon in the ISM of Spirals)

       The Faint Object Spectrograph (Red Side) was used to obtain =
ultraviolet and optical spectra of the H II regions in the spiral galaxy =
NGC-2403.  The intent is to derive the Carbon abundances and Carbon/Oxygen =
ratios at several positions in this galaxy.  During this proposal at =
055/080906Z, following the guide star acquisition and the FOS target =
acquisition, and after a ZOE, it was observed that the Y-Door (the FOS =
shutter door) was closed.  The implication is that there was a guiding =
problem, such as a loss of lock.  In any event, the take data flag was =
down for the remainder of the proposal, for a total of five observations.  =
HSTAR 5513 was written.  No other anomalies were noted.

   1.11 Completed FOS/RD 5852 (Lyman-alpha Forest Cloud Sizes and =
Clustering at Z~0.5)

       The Faint Object Spectrograph (Red Side) was used to make =
spectrographic observations of QSO MC1146+111 to study its Lyman-Alpha =
forest and its relation to other nearby QSOs.  The observations were =
executed as scheduled, and no anomalies were noted.

   1.12 Completed FOS/RD 6007 (Comparison of Large Scale Structures in QSO =
Absorbers and Galaxies)

       The Faint Object Spectrograph (Red Side) was used to make =
observations of Lyman-Alpha absorber TON156 to do a comparison study of =
its large scale structure.  This target was selected as a deep, redshifted =
galaxy from a survey which already exists.  As documented in HSTAR 5514, =
the FGS acquisition for this proposal failed to fine lock on FGS #1 only.  =
Also, as described in HSTAR 5515, a status buffer dump revealed a fine =
X-Null balance failure at 055/221135Z.  Otherwise, the observations were =
executed as scheduled, and no other anomalies were noted.

   1.13 Completed GHRS/2 5833 (The Nature of Lyman Alpha Emission From =
Galaxies)

       The High Resolution Spectrograph (Side Two) was used to make =
ultraviolet observations of galaxy IRAS08339 in order to study its =
Lyman-Alpha Emission.  Previous HST exposures suggest the photons are =
scattered before they escape from the galaxy.  The observations were =
executed as scheduled, and no anomalies were noted.

   1.14 Completed Two Sets of 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-2460 in order to study its central bulge.  The aim is to =
investigate the core properties, correlation's 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.

   1.15 Completed GHRS/2 6289 (High Resolution Spectroscopy with HST-Final =
GTO Observations)

       The High Resolution Spectrograph (Side Two) was used to make high =
resolution spectrographic observations of the star Epsilon Aurigae (aka, =
HD217505).  The observations were completed as planned, and no anomalies =
were reported.

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

       The WF/PC-2 was used to make observations of the galaxy NGC-2090 =
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.

   1.17 Completed WF/PC-2 6095 (Hot Stellar Populations in Globular =
Cluster Cores)

       The WF/PC-2 was used to make observations of globular cluster =
NGC-6388 to study the radial gradients of the hot stellar population in =
its core region.  Observations were made in the blue, violet and far =
ultraviolet.  The observations were completed as planned, and no problems =
were reported.

   1.18 Completed WF/PC-2 5838 (The Rapidly Evolving Hypergiant IRC+10420)

       The WF/PC-2 was used to make observations of the rapidly evolving =
hypergiant star IRC+10420.  This unique object is caught in the short =
transition phase between red supergiant and the Wolf-Rayet stage.  The =
goal is to determine whether the geometry of the stellar wind is disk-like =
of bipolar.  The observations were completed as scheduled, and no =
anomalies were noted.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 19
                                        Successful : 19

       An acquisition at 055/221135Z failed to fine lock on FGS #1 only.  =
HSTAR 5514 was written.

                          Scheduled Reacquisitions : 21
                                        Successful : 21

   2.2 FHST Updates: 

                              Scheduled : 41
                             Successful : 41

   2.3 Operations Notes: 

       Following dumps of ESTRs #1 and #3, which appeared to be nominal in =
the STOCC, the DCF reported that there was missing data.  Early on day =
057, the appropriate portion of ESTR #3 was re-dumped and the DCF reported =
that all lost observations had been recovered.  Later, seventy-five =
percent of ESTR #1 was re-dumped.  The DOC reported that no data was =
present, although the TTAC showed lock.  Unless this portion can be =
recovered, some WF/PC-2 data will be lost.  HSTAR 5517 was written.

3.0 SIGNIFICANT FORTHCOMING EVENTS: 

        Nothing at this time.

/DMH