HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1661

PERIOD COVERED:  0000Z (UTC) 06/21/96 - 0000Z (UTC) 06/24/96

Daily Status Report as of 176/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Two 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.  A Taled calibration was also completed.  The observations were =
completed as planned, and no anomalies were reported.

   1.2 Completed WF/PC-2 6629 (Observations of a New Sample of =
Gravitational Lens Candidates )

       The WF/PC-2 was used to make observations of the gravitational =
lens candidate QSO-113000.  This object was identified in the first and =
second phases of the Cosmic Lens All-Sky Survey done with the Very Large =
Array radio telescope.  The observations were executed as scheduled, and =
no anomalies were noted.

   1.3 Completed WF/PC-2 6431 (Determination of the Extragalactric =
Distance Scale)

       The WF/PC-2 was used to make observations of the galaxy NGC-4535 =
to be used in measuring the periods of Cepheid variable stars within this =
galaxy.  This will allow for a more accurate estimate of the distances to =
these galaxies through the period-luminosity relation for the Cepheid =
stars.  The observations were executed as scheduled, and no anomalies =
were noted.

   1.4 Completed WF/PC-2 6187 (WF/PC-2 Cycle 5 Calibration: Earth Flat)

       The WF/PC-2 was used to make Earth streak flat calibration images. =
 These streak flats will be used to produce flat fields, to map the OTA =
illumination pattern and, in combination with other data, to produce new =
superflats.  The observations were completed as planned, and no problems =
were reported.

   1.5 Completed WF/PC-2 6002 (Spectroscopy of the Rapidly Rotating =
Nuclear Disk in the Virgo S0 NGC-4526)

       The WF/PC-2 was used to make spectrographic observations of the =
rapidly rotating nuclear disk in S0 class galaxy NGC-4526 which is =
located in the Virgo Cluster.  The nucleus of this galaxy was imaged in =
cycle 4, and new images with different filters were used to make color =
corrections and allow the subtraction of the stellar continuum.  The =
observations were completed as planned, and no problems were reported.

   1.6 Completed WF/PC-2 5997 (The Cores of Elliptical Galaxies in the =
Coma Cluster)

       The WF/PC-2 was used to make observations of the large elliptical =
galaxies GAL-125054 and IC832 which are located in the Coma Cluster.  The =
purpose is to study the luminosity profiles in their central nuclear =
regions.  The observations were completed as scheduled, and no anomalies =
were noted.

   1.7 Completed GHRS/1 6758 (Far UV airglow and Albedo Observations of =
Europa and Ganymede)

       The High Resolution Spectrograph (Side One) was used to make far =
ultraviolet spectrographic observations of the airglow and albedo of =
Jupiter's moon Ganymede.  Observations were made of both the leading and =
trailing hemispheres.  The long term stability of the oxygen airglow =
emission and the magnitude of the hemisphere asymmetry will be =
determined.  The observations were completed as planned, and no problems =
were reported. 

   1.8 Completed Two Sets of WF/PC-2 6183 (WF/PC-2 Cycle 5 Calibration: =
Decon)

       The WF/PC-2 was used to make some internal flat, K-Spot, and dark =
calibration images.  The purpose is to define decontamination procedures =
to be run during Cycle 5.  The calibration observations were completed as =
scheduled, and no anomalies were reported.

   1.9 Completed WF/PC-2 5984 (Absorption - Selected Galaxies)

       The WF/PC-2 was used to study the morphology of galaxy PKS1354+19, =
at redshifts from 0.4 to 1.0, that is absorbing light from background =
quasars.  The absorbing galaxies were discovered from ground-based =
surveys.  The observation was completed with no reported anomalies.

   1.10 Completed FOS/BL 6474 (UV Spectroscopy of a Peculiar Highly =
Magnetic White Dwarf)

       The Faint Object Spectrograph (Blue Side) was used to make =
ultraviolet spectrographic observations of the peculiar, highly magnetic, =
white dwarf star HE1211-170.  This star shows spectral variations which =
are believed to be due to a magnetic field which is relatively uniform in =
one hemisphere and much more heterogeneous in the other.  The =
observations were executed as scheduled, and no anomalies were noted.

   1.11 Completed Two 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.

   1.12 Completed FOS/RD 6577 (An Expanded Survey for Study of the =
Lyman-Alpha Line and QSO Mg II Absorption)

       The Faint Object Spectrograph (Red Side) was used to make =
observations of the QSO PKS1127-14 in order to make a survey of the =
Lyman-Alpha line and the 68 Mg II absorption line system.  The =
observations were completed as scheduled, and no problems were reported. 

   1.13 Completed WF/PC-2 6557 (Redshift Absorption Selected Galaxies)

       The WF/PC-2 was used to make observations of the galaxy Q1241 =
where a halo appears to be absorbing light from the background =
quasi-stellar object (QSO) Q1241.  The observations were completed as =
planned, and no problems were reported.

   1.14 Completed Two sets of WF/PC-2 5844 (HST Investigation of a =
Bright, New Comet)

       The WF/PC-2 was used to make observations of the bright new comet =
Hale-Bopp (aka, Comet C/1995 O1).  The images will yield information of =
the nuclear size and coma near the nucleus.  The observations were =
completed as planned, and no anomalies were noted.

   1.15 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 HD219617 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.

   1.16 Completed FOS/BL 6721 (Ultra-Rapid Continuum Variability as a =
Probe of AGN Physics)

       The Faint Object Spectrograph (Blue Side) was used to make observat=
ions of the ultra-rapidly variability in the continuum of the active =
galactic nuclei of Seyfert galaxy NGC-7469.  These data will be used to =
study the temporal variations which have been observed in the past, and =
to determine its wavelength dependence and the time delay between the =
variations in the ultraviolet and optical parts of the spectrum.  The =
observations were completed as scheduled, and no problems were noted.

   1.17 Completed FOC/96 6349 (Snapshot search for High Redshift QSOs =
with Far-UV Flux)

       The Faint Object Camera (f/96) was used to make snapshot images of =
the quasi-stellar object Q2203-357.  This is to determine if this high =
redshifted object has a far ultraviolet flux.  The observations were =
executed as scheduled, and no anomalies were noted.

   1.18 Completed FOS/BL 6489 (The Identification and Cooling of the =
White Dwarf in WZ SGE Like Systems)

       The Faint Object Spectrograph (Blue Side) was used to make =
spectrographic observations of the white dwarf nova in the AL Com system. =
 AL Com, like WZ Sge, has outburst in the last month.  These outbursts =
are usually separated by decades, but Al Com went though an outburst in =
the spring of 1995.  The observations were completed as planned, and no =
anomalies were reported.

   1.19 Completed WF/PC-2 5971 (HST Medium Deep Survey)

       The WF/PC-2 was used to make long-exposure, medium-deep sky survey =
observations at latitudes larger than 10 degrees taken in parallel with =
the prime science observations.  The observations were executed as =
scheduled, and no anomalies were noted.

   1.20 Completed WF/PC-2/GHRS/1 5828 (HST Far-UV Imaging and Spectra of =
Jupiter Coordinated With the Galileo Probe)

       The WF/PC-2 and the High Resolution Spectrograph (Side One) were =
both used to make images and ultraviolet spectrographic observations of =
the planet Jupiter in order to study the auroral zones located near the =
planet's magnetic poles.  These observations were taken at the same time =
that the Galileo spacecraft makes spectral observations.  As reported in =
Section 2.1, after the initial acquisition and reacquisition, several =
periods of guide star loss of lock occurred.  No further problems were =
reported. 

   1.21 Completed WF/PC-2 6364 (Snapshot Survey of Proto-Planetary =
Nebulae and AGB Stars)

       The WF/PC-2 was used to make some snapshot survey observations of =
protoplanetary nebular system HE3-1475 to study its circumstellar =
envelope.  The purpose is to discern the evolutionary sequence that =
produces axially-symmetric planetary nebulae.  The observations were =
executed as scheduled, and no anomalies were noted.

   1.22 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 3C415.2.  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 : 23
                                        Successful : 23

                          Scheduled Reacquisitions : 22
                                        Successful : 22

       As documented in HSTAR 5640, several periods of guide star loss of =
lock occurred after the successful acquisition and reacquisition at =
175/1305Z and 175/1312Z.

   2.2 FHST Updates: 

                              Scheduled : 50
                             Successful : 49

       The update scheduled at 176/0230Z failed.

   2.3 Operations Notes: 

       HSTAR 5638, written by Data Capture Facility personnel reported =
data drop-outs during several WF/PC-2 observations made on day 170.  =
Subsequent HSTAR 5639, written by the STScI, pointed out similarities =
between this occurrence and events which happened just before ESTR #2 was =
turned off.  Further analysis is being performed.

       Otherwise, there were no significant operational problems =
occurring this weekend.

3.0 SIGNIFICANT FORTHCOMING EVENTS: 

        Nothing at this time.

/DMH