HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1658

PERIOD COVERED:  0000Z (UTC) 06/18/96 - 0000Z (UTC) 06/19/96

Daily Status Report as of 171/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 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.

   1.2 Completed Two 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.

   1.3 Completed Two Sets of 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-4860, Gal-125830, IC834 and NGC-4824 which are located in =
the Coma Cluster.  The purpose is to study the luminosity profiles in the =
central nuclear region.  The observations were completed as scheduled, =
and no anomalies were noted.

   1.4 Completed WF/PC-2 6189 (WF/PC-2 Cycle 5 Calibration: Internal =
Monitor - Vis Flats)

       The WF/PC-2 was used to make internal visual flat calibration =
images.  Both photometric and narrow-band filters were used.  The =
observations were executed as planned, and no problems were reported.

   1.5 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 indicate that the CO abundance correlates with the =
overall activity of the comet.  The observations were completed as =
planned, and no problems were noted.

   1.6 Completed WF/PC-2/GHRS/1/FOS/BL 6567 (Wind of Massive Stars in =
Nearby Galaxies)

       The WF/PC-2, the High Resolution Spectrograph (Side One), and the =
Faint Object Spectrograph (Blue  Side) were all used to make observations =
of hot stars in the local-group, irregular galaxy NGC-6822.  Detailed =
studies of the hot stellar populations in galaxies outside the Milky Way =
provide very important tests of the theories of stellar winds and star =
formation and evolution.  The observations were executed as scheduled and =
no anomalies were noted. 

   1.7 Completed FOS/BL 6747 (A Snapshot of the UV Spectrum of NGC-6469)

       The Faint Object Spectrograph (Blue Side) was used to make high =
resolution, ultraviolet, spectrographic observation of the type 1 Seyfert =
galaxy NGC-7469.  This is to support the 30 days of the International AGN =
Watch.  The XTE and IUE satellites are also scheduled to watch this =
object during the designated period.  The observations were executed as =
scheduled, and no anomalies were noted.

   1.8 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.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 6
                                        Successful : 6

                          Scheduled Reacquisitions : 8
                                        Successful : 8

   2.2 FHST Updates: 

                              Scheduled : 12
                             Successful : 12

   2.3 Operations Notes: 

       SM2 personnel participated in GSFC Internal Simulation #6 =
yesterday.  During the simulation, HST opertions personnel were in the =
SAMS backup facility.  After the simulation, these personnel remained in =
SAMS to allow for planned facility testing in the MOR area to proceed =
today.

3.0 SIGNIFICANT FORTHCOMING EVENTS: 

        Nothing at this time.

/DMH