HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1553

PERIOD COVERED:  0000Z (UTC) 01/19/96 - 0000Z (UTC) 01/22/96

Daily Status Report as of 022/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 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-1689-11 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.

   1.2 Completed FOS/RD 5824 (Occultation of GSC5249 by Saturn)

      The Faint Object Spectrograph (Red Side) was used to observe =
Saturn's atmosphere and its rings while being occulted by Tethys.  Spectra =
of the occulted object, of Saturn's atmosphere and of Saturn's rings will =
be obtained before and after the occultation.  At 019/1018Z and as =
recorded in HSTAR 5471, an FOS target acquisition failed due to an FGS =
loss of lock.  Otherwise, the observations were completed, and no other =
problems have been reported.

   1.3 Completed Two Sets of WF/PC-2 6352 (Dwarf Eliptical Galaxy =
Snapshots)

       The WF/PC-2 was used to survey VCC1577, from a sample of 30 dwarf =
eliptical galaxies.  The observations were completed as planned, and no =
anomalies were reported.

   1.4 Completed Two Sets of GHRS/2 6172 (CRIMP2: Cycle 5 =
Condensed-Regimen Integrated Monitoring Program)

       The High Resolution Spectrograph (Side Two) was used  to obtain =
darks, internal flats (in photoscan mode), wavelength calibrations and =
observations of standard star BD+28D4211.  This includes detector =
calibration, sensitivity monitoring, and wavelength monitoring.  The =
observations were executed as scheduled, and no anomalies were noted. 

   1.5 Completed WF/PC-2 5910 (The Far-Field Hubble Constant)

      The WF/PC-2 was used to make observations of the Abel galaxy cluster =
3565 in order to determine the HST Far-Field Hubble constant. The =
observations were executed as planned, and no anomalies were reported.

   1.6 Completed WF/PC-2 5999 (The Nuclear Structure of S0 Galaxies: A PC =
Imaging Survey)

       The WF/PC-2 was used to make observations of S0 class NGC-4150 in =
order to study its nuclear structure.  This is a part of a large survey of =
S0, E/S0, and S0/a class galaxies.  The targets will cover a wide range in =
luminosity and environment.  The observations were completed as planned, =
and no anomalies were noted.

   1.7 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.

   1.8 Completed FGS 6267 (Parallax of Feige 24)

       The FGSs were used in the POS Mode to make astrometric observations =
of the white dwarf star FEIGE 24 and several reference stars in order to =
measure its parallax.  The target is one of the first white dwarfs found =
to be an EUV source and subsequently has been found to be an X-Ray source =
and an interacting binary.  The observations were completed as planned, =
and no problems were reported.

   1.9 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.

   1.10 Completed COSTAR/U 6162 (FOC Cycle 5 PSF Monitoring)

       The Faint Object Camera (f/96) was used to make observations of a =
standard star BPM16274 and to monitor the point spread function of the =
COSTAR optical system.  An internal flat calibration image was also taken. =
 The observations were completed as scheduled, and no anomalies were =
noted.

   1.11 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.

   1.12 Completed Three Sets of FOS/RD 6236 (FOS Cycle 5: Location of =
Spectra and Wavelength Calibration: Red Side Detector)

       The Faint Object Spectrograph (Red Side) was used to make =
calibration observations in order to determine the location of the spectra =
and to perform a wavelength calibration.  All observations were internal.  =
The observations were completed as planned, and no anomalies were =
reported.

   1.13 Completed WF/PC-2 5962 (Young Globular Clusters in Merging =
Galaxies: Part III)

       The WF/PC-2 was used to make observations of two merging galaxies =
(aka, NGC-4038/4039) in order to study its compact young blue globular =
clusters to determine their age, luminosity function, and physical =
properties.  The observations were executed as scheduled, and no anomalies =
were noted.

   1.14 Completed GHRS/2 5857 (Is Mixing or Mass Loss the Cause of Decline =
in 12C/13C)

       The High Resolution Spectrograph (Side Two) was used to make =
spectrographic observations of the halo star HD122563 to study the ratio =
of its 12C/13C Carbon and the abundance of its boron.  The results will =
influence models of evolution off of the main sequence.  The observations =
were completed as planned, and no problems were reported.

   1.15 Completed FOS/RD 6222 (Spectra of Gravitationally Lensed QSO =
PG1115+080)

       The Faint Object Spectrograph (Red Side) was used to make =
observations of the gravitationally lensed quasar PG1115+080.  Variations =
in the velocity and column density of Lyman-Alpha forest clouds and =
associated absorption systems on small scales will be studied with =
observations of a closely spaced pair of images of the QSO.  The =
observations were executed as scheduled, and no anomalies were noted.

   1.16 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 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.

   1.17 Completed FOS/BL 6103 (Ne VIII 774 Emission From QSOs)

       The Faint Object Spectrograph (Blue Side) was used to make =
observations of QSO Q1435-0134 in order to study its Ne VIII 774 =
emissions.  Confirmation of this very high ionization line would tell much =
about the physical conditions within the QSO.  The observations were =
completed as scheduled, and no anomalies were reported.

   1.18 Completed WF/PC-2 6107 (Dynamics and Ages of Nuclear Stellar Disks =
in Virgo E/S0 Galaxies)

       The WF/PC-2 was used to make observations of the E/S0 class galaxy =
NGC-4342 which is located in the Virgo Cluster in order to study its age =
and its thin nuclear stellar disk.  The images will also be examined for =
population differences between the disk and that of the host galaxy.  The =
observations were completed as planned, and no anomalies were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 16
                                        Successful : 16

       As documented in HSTAR 5471, there was an FGS loss of lock at =
019/1018Z.

                          Scheduled Reacquisitions : 27
                                        Successful : 27

   2.2 FHST Updates: 

                              Scheduled : 44
                             Successful : 44

   2.3 Operations Notes: 

       The Battery #5 capacity test is ongoing.

       Operations personnel tried to dump ESTR #2 at 019/1613Z.  There was =
no tape motion and the motor current flagged high.  ESTR #2 was =
subsequently powered off.  An investigation of this anomalous event is in =
progress.  Until a determination is made as to the likely status of ESTR =
#2 and further engineering testing is performed, engineering data normally =
collected during LOS periods on ESTR #2, is lost.

3.0 SIGNIFICANT FORTHCOMING EVENTS: 

        Nothing at this time.

/DMH