HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1626

PERIOD COVERED:  0000Z (UTC) 05/02/96 - 0000Z (UTC) 05/03/96

Daily Status Report as of 124/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Two Sets of GHRS/1 6171 (CRIMP1: Cycle 5 =
Condensed-Regimen Integrated Monitoring Program)

       The High Resolution Spectrograph (Side One) was used  to obtain =
darks, internal flats (in photoscan mode), wavelength calibrations and =
observations of standard star BD+28D4211.  This includes detector =
calibration, sensitivity monitoring, and wavelength monitoring.  During =
the first iteration of this proposal, near the beginning at 123/000855Z, =
there was a status buffer Exec 309 message, meaning that the output of a =
standard header packet or an SI unique data log was requested while =
science data output was not permitted by the ground.  Later, at =
123/002338Z, there was an HRS 105 status buffer message stating that the =
science observation was temporarily ended because there were too many =
consecutive lines of science data having bad data quality.  HSTARs 5596 =
and 5597 were written for these occurrences.  Otherwise, the observations =
were executed as scheduled, and no further anomalies were noted. 

   1.2 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.

   1.3 Completed WF/PC-2 6184 (WF/PC-2 Cycle 5 Photometric Calibration =
Monitor UV/OPT STD)

       The WF/PC-2 was used to make ultraviolet and optical observations =
of standard star GRW+70D582 in order to monitor the photometric =
calibrations of the camera and to check for decontamination.  The =
observations were executed as scheduled, and no anomalies were noted.

   1.4 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 HD120285 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.

   1.5 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.

   1.6 Completed WF/PC-2 6579 (The Cosmic Velocity of the Great Attractor)=


       The WF/PC-2 was used to make observations of the galaxy NGC-4709 =
which is located in the Centaurus Cluster.  The objective is to measure =
its distance, using the "surface brightness fluctuation" method.  When =
combined with the radial velocity, these measurements will allow the =
investigator to determine whether the Centaurus Cluster is falling in to =
the Great Attractor.  The observations were executed as scheduled, and no =
anomalies were noted.

   1.7 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 galaxy NGC-4472.  A luminosity =
function will be derived which should be complete down to the 27th =
magnitude in V.  The observations were completed as planned, and no =
problems were reported.

   1.8 Completed FOS/RD 6167 (FOS Cycle 5: Dark Monitoring)

       The Faint Object Spectrograph (Red Side) was used to make several =
dark calibration images.  All exposures were internals.  All spectra was =
done in the image mode.  The observations were completed as planned, and =
no problems were reported.

   1.9 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.

   1.10 Completed WF/PC-2 5999 (The Nuclear Structure of S0 Galaxies: A =
PC Imaging Survey)

       The WF/PC-2 was used to make observations of S0 class galaxy =
NGC-4431 in order to study its nuclear structure.  This is a part of a =
large survey of S0, E/S0, and S0/a class galaxies.  The targets will =
cover a wide range in luminosity and environment.  The observations were =
completed as planned, and no anomalies were noted.

   1.11 Completed FOS/BL 5921 (FOS Observations of Ionized Gas in Two =
Early-Type Galaxies)

       The Faint Object Spectrograph (Blue Side) was used to make =
observations of the early type galaxy NGC-4486 in order to study its =
ionized gas which contains Si IV, C IV, and N V.  At 123/212705, as =
reported in HSTAR 5599, there was an FOS target acquisition failure.  The =
status buffer message indicated that there were no stars in the FOS =
aperture.  The observations were completed as planned, and no problems =
were reported.

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

       The WF/PC-2 was used to make a 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.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 5
                                        Successful : 5

                          Scheduled Reacquisitions : 10
                                        Successful : 10

   2.2 FHST Updates: 

                              Scheduled : 12
                             Successful : 12

   2.3 Operations Notes: 

       HST operations returned to the MOR area at 123/2345Z after the =
completion of GSFC Simulation #4 (EVA #2).

3.0 SIGNIFICANT FORTHCOMING EVENTS: 

        Nothing at this time.

/DMH