HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1604

PERIOD COVERED:  0000Z (UTC) 04/02/96 - 0000Z (UTC) 04/03/96

Daily Status Report as of 094/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed FOS/RD 6613 (The Origin of C_2 in Comets)

       The Faint Object spectrograph (Red Side) was used to make =
spectrographic observations of the Mulliken and Swan bands of C_2 in the =
new comet Hyakutake.  Observations were taken at five relative positions =
within the nucleus of the comet.  The observations were executed as =
scheduled, and no anomalies were noted.

   1.2 Completed Three 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.

   1.3 Completed WF/PC-2 6259 (Imaging of Near Nuclear Plasma  in Comets)

       The WF/PC-2 was used to make high resolution, multi-color =
observations of the comet Hyakutake in order to study the plasma near the =
comet's nuclear region.  The intent is to study the interaction of the =
comet with the solar wind, that is, to determine the structure and =
evolution of the plasma.  The observations were executed as scheduled, =
and no anomalies were noted.

   1.4 Completed WF/PC-2 6424 (Calibrations of Stellar Evolutionary Ages =
and Variations in the LMF)

       The WF/PC-2 was used to make observations of the relatively old =
open cluster NGC-2420 to determine the luminosity and mass function (LMF) =
of the white dwarfs and low mass (i.e., red) stars and to make a =
calibration study of stellar evolutionary ages.  The observations was exec=
uted as scheduled and no anomalies were noted.

   1.5 Completed FOS/RD/BL 6043 (The Interaction of Supernovae with their =
Curcumstellar medium)

       The Faint Object Spectrograph (Both Red and Blue Sides) was used =
to make ultraviolet observations of Type 3 supernova remnant SN1988Z to =
study its interaction with the curcumstellar medium and the supernova =
blast wave, which itself is a product of the stellar wind from the =
supernova progenitor.  The observations were executed as scheduled, and =
no anomalies were noted.

   1.6 Completed WF/PC-2 6366 (The Early Onset of Asymmetric Outflow =
During the Planetary Nebula formation)

       The WF/PC-2 was used to make observations of the planetary nebula =
RW-LMI in order to study its asymmetric outflow during its formation.  =
The purpose of these exposures was to determine the characteristics of =
the mass loss that occurs as a star leaves the asymptotic giant branch.  =
The observations were completed as planned, and no problems were =
reported.

   1.7 Completed WF/PC-2 6736 (A comprehensive Study of H Ly-Alpha Line =
Profile and Water)

       The WF/PC-2 was used to make observations of the comet Hyakutake =
in order to make a comprehensive study of hydrogen, Lyman Alpha, and =
water in the comet. ,The results should improve the understanding of how =
water is produced and destroyed in comets.  The observations were =
completed as scheduled, and no anomalies were noted.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 8
                                        Successful : 7

       The acquisition at 040/084023Z failed to single FGS backup using =
FGS #2.  HSTAR 5560 was written.

                          Scheduled Reacquisitions : 7
                                        Successful : 7

   2.2 FHST Updates: 

                              Scheduled : 15
                             Successful : 15

   2.3 Operations Notes: 

       There were no significant operational problems.

3.0 SIGNIFICANT FORTHCOMING EVENTS: 

        Nothing at this time.

/DMH