HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1646

PERIOD COVERED:  0000Z (UTC) 05/31/96 - 0000Z (UTC) 06/03/96

Daily Status Report as of 155/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 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 galaxies 3C40.0 and 3C330.0.  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.

   1.2 Completed WF/PC-2 5920 (Extragalactic Globular Cluster System)

       The WF/PC-2 was used to make observations to compile a catalogue =
of the extragalactic globular clusters in NGC-4365.  A luminosity =
function will be derived which should be complete down to the 27th =
magnitude in V.  The observations was completed as planned, and no =
problems were reported.

   1.3 Completed WF/PC-2 6646 (WF/PC-2 Imaging Dwarf Spirals)

       The WF/PC-2 was used to make ultraviolet and blue observations of =
the dwarf spiral galaxy D721-5.  It is known to have low surface =
brightness with very blue mean color but no evidence of recent or past =
star formation.  The observations were completed as planned, and no =
problems were reported.

   1.4 Completed Three Sets of 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 Two Sets of WF/PC-2 6431 (Determination of the =
Extragalactric Distance Scale)

       The WF/PC-2 was used to make observations of the galaxies NGC-4548 =
and NGC-4535 to be used in measuring the periods of Cepheid variable =
stars within this galaxies.  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.

   1.6 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 NGC-4952 and NGC-5004 which are located in the Coma Cluster.  =
The purpose is to study the luminosity profiles in their central nuclear =
region.  The observations were completed as scheduled, and no anomalies =
were noted.

   1.7 Completed Two Sets of WF/PC-2 6361 (High Resolution Imaging of =
X-Ray Selected AGNs)

       The WF/PC-2 was used to make high resolution  observations of the =
known low red shifted x-ray active galactic nuclei (AGN) MS0719.9+7 and =
MS2118.4-1.  These data will allow a study of the optical properties of an=
 unbiased sample of AGN host galaxies.  The observations were completed =
as scheduled, and no problems were reported.

   1.8 Completed WF/PC-2 6477 (The Color Magnitude Diagram of a Super =
Metal Rich Globular Cluster)

       The WF/PC-2 was used to make multicolor observations of the super =
metal rich globular cluster (GC) in NGC-224 in order to obtain data to =
build a color magnitude diagram.  This globular cluster is located in the =
Andromeda Galaxy (aka, M-31 or NGC-224).  It is hoped to be able to =
resolve the horizontal branch stars within the cluster.  The observations =
were executed as planned, and no anomalies were reported.

   1.9 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 quasi-stellar objects 0002-422, 4C61.20 and =
PG1329+412 in order to make a survey of their Lyman-Alpha line and the 68 =
Mg II absorption line system.  The observations were completed as schedule=
d, 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 HD84748 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 FGS 6047 (Calibrating the Mass Luminosity Relation at =
the End of the Main Sequence)

       The FGS were used to make astrometric observations of star GL469AB =
as part of a study to determine its mass luminosity relationship.  The =
purpose is to measure the precise parallax and relative orbit of its =
faint companion.  The observations were completed as planned, and no =
problems were reported.

   1.12 Completed WF/PC-2 6439 (Using Cepheid Based Distance to Test =
Large Peculiar Motions)

       The WF/PC-2 was used to make observations of the spiral galaxy  =
NGC-4603 which is located in the Centaurus galaxy cluster to look for =
Cepheid variable stars to be used to measure the distance to the object, =
which in turn will be used to study its large peculiar motions.  If this =
galaxy is a cluster member, as appears from secondary distance =
indicators, then its peculiar velocity is inconsistent with that =
predicted from the density field as reconstructed from the observational =
distribution of galaxies in the cluster.  The observations were executed =
as scheduled, and no anomalies were reported.

   1.13 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 Q0941+260.  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.

   1.14 Completed S/C 5582 (FOC/48 Monthly Activation (Camera Section =
Only): Cycle 4) 

        This proposal was executed as scheduled, and no anomalies were =
noted. 

   1.15 Completed WF/PC-2 5907 (Colour Magnitude Diagrams of two =
Super-Metal-Rich Globular Clusters)

       The WF/PC-2 was used to make observations of the super-metal-rich =
globular cluster NGC-224-G17.  The high resolution of the PC will allow =
individual stars to be distinguished, from which the investigator can =
build a color magnitude diagram of this unusual cluster.  As mentioned in =
2.1, the initial acquisition for this proposal resulted in control on FGS =
#3 only.  Otherwise, the observations were completed as scheduled, and no =
further problems were reported.

   1.16 Completed Three Sets of WF/PC-2 6591 (A Campaign to Determine the =
CO (and CO2) Abundances in Cometary Nuclei)

       The WF/PC-2 was used to make observations of the comet Hyakutake =
in order study its CO and CO2 abundances relative to water.  Existing HST =
and archived IUE data indicates that the CO abundance correlates with the =
overall activity of the comet.  The observations were completed as =
planned, and no problems were noted.

   1.17 Completed WF/PC-2 5990 (Globular Clusters in the Fornax Galaxies)

       The WF/PC-2 was used to search for globular clusters in galaxy =
NGC-1399 which is a member of the Fornax Galactic Cluster.  Because the =
galaxies in the Fornax Cluster have different morphologies than those of =
the local group, the globular cluster systems are also expected to show =
differences.  The observations were executed as scheduled, and no =
anomalies were noted.

   1.18 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 =
WR86 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.

   1.19 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.

   1.20 Completed Two Sets of WF/PC-2 6365 (A Snapshot survey For =
Companions and Clusters around Wolf-Rayet Stars)

       The WF/PC-2 was used to make snapshot observations of Wolf-Rayet =
star WR86 in order to look for companion stars and clusters.  Photometry =
was performed on the Wolf-Rayet star and associated stars. The =
observations were completed as planned, and no anomalies were reported.

   1.21 Completed 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-6340 in order to study its central bulge.  The aim is =
to investigate the core properties, correlations 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.

   1.22 Completed WF/PC-2 5994 (HST Images of New Candidates For Distant =
Proto-Ellipticals)

   The WF/PC-2 was used to make an observation of blue compact galaxy =
Herc-13925 in order to measure its size, light profiles, and color.  The =
observation was executed as scheduled, and no anomalies were noted.

   1.23 Completed FGS 6063 (Continuation of Mass Ratio Determination for =
Doubles)

       The Fine Guidance Sensors were used to make POS and TRANS mode =
astrometric observations of double star L722-22-00.  This binary star =
system contains a low mass star and a brown dwarf.  The observations were =
completed as scheduled, and no anomalies were noted.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 30
                                        Successful : 30

       The acquisition at 153/1845Z resulted in FGS #3 fine lock backup.  =
HSTAR 5621 was written.

                          Scheduled Reacquisitions : 17
                                        Successful : 17

   2.2 FHST Updates: 

                              Scheduled : 57
                             Successful : 57




   2.3 Operations Notes: 

       There were no significant operational problems encountered during =
the entire weekend period.

3.0 SIGNIFICANT FORTHCOMING EVENTS: 

        Nothing at this time.

/DMH