HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1692

PERIOD COVERED:  0000Z (UTC) 08/07/96 - 0000Z (UTC) 08/08/96

Daily Status Report as of 221/0000Z

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 WF/PC-2 6621 (55P/Temple and Leonid Meteors)

       The WF/PC-2 was used to make observations of the comet =
Tempel-Tuttle/55P which is the parent of the Leonid meteor stream.  The =
comet observations were produced while it still is a long distance from =
the sun in order to estimate the size and rotation of its nucleus.  This =
will allow for a more accurate model of the Leonids as to how nuclear =
size and rotation have the greatest effect on predictive models for =
meteor storms.  The observations were executed as scheduled, and no =
anomalies were noted.

   1.3 Completed WF/PC-2 6218 (Io's Surface, Atmosphere, and Plasma =
Torus)

       The WF/PC-2 was used to make near ultraviolet observations of =
Jupiter's moon Io's plasma torus to study structures which might not be =
visible in ground based observations.  A wavelength calibration image was =
also taken.  The observations were completed as planned, and no problems =
were reported.

   1.4 Completed WF/PC-2 6774 (Temporal Variability in Io's Surface and =
Plumes)

       The WF/PC-2 was used to make observations of Jupiter's moon Io at =
longitude 100 degrees in order to study temporal variability in its plums =
and surface markings.  The longitude was chosen such that a known volcano =
will be present at Io's limb.  The observations were executed as =
scheduled, and no anomalies were noted. 

   1.5 Completed FOS/BL 6539 (Ultraviolet Spectroscope of Seyfert 2 =
Nuclei)

       The Faint Object Spectrograph (Blue Side) was used to make =
ultraviolet spectrographic observations of nucleus of the Seyfert =
class-two galaxy NGC-7130.  The objective is to determine whether or not =
the featureless continuum is produced by hot massive stars in a =
circumnuclear starburst region.  A wavelength calibration image was also =
taken.  The observations were completed as planned, and no problems were =
reported. 

   1.6 Completed GHRS/2 6456 (The Photospheric Iron Abundance of the UV =
Bright Stars in a Globular Cluster)

       The High Resolution Spectrograph (Side Two) wad used to make =
ultraviolet spectrographic observations of five ultraviolet bright stars =
located in the globular cluster NGC-5272 in order to study the stars' =
iron abundances and the prediction given by stellar evolution theory.  =
These ultraviolet bright stars are in a post-AGB stage of evolution, and =
are on the way to becoming white dwarf stars.  The guide star acquisition =
scheduled at 220/221849Z defaulted to single FGS 1 fine lock backup at =
220/222735Z.  HSTAR 5673 was written.  Otherwise, the observations =
completed as planned, and no further problems were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 6
                                        Successful : 6

                          Scheduled Reacquisitions : 11
                                        Successful : 11

       As described in section 1.6, an acquisition at 220/221849Z =
defaulted to fine lock guidance on one FGS only.

       Later, as described in HSTAR 5674, at 221/045134Z another =
acquision failed to fine lock backup on FGS 3 only.  The proposal =
affected will be described in tomorrow's report.

   2.2 FHST Updates: 

                              Scheduled : 13
                             Successful : 13

   2.3 Operations Notes: 

       HST operations returned from the SAMS back-up facility at =
220/2200Z.  No problems were encountered.

3.0 SIGNIFICANT FORTHCOMING EVENTS: 

        Nothing at this time.

/DMH