HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1856

PERIOD COVERED:  0000Z (UTC) 04/14/97 - 0000Z (UTC) 04/15/97

Daily Status Report as of 105/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed FGS 6883 (Orbital Parameters of Known Binary)

       The FGSs were used to make astrometric observations of the known =
binary star system SAO103656 (aka ADS 11300) in order to obtain its =
orbital parameters.  The target is a known double star with an orbital =
period of 54 years.  The observations were executed as scheduled, and no =
anomalies were noted.

   1.2 Completed WF/PC-2 6905 (WF/PC-2 Cycle 6 Calibration: Internal =
Monitor)

       The WF/PC-2 was used to make several internal calibration =
observations including biases and internal flats as part of a Cycle 6 =
calibrations procedure.  A variety of internal exposures are run weekly =
to verify and monitor the health of the camera.  The observations were =
executed as scheduled, and no anomalies were noted.

   1.3 Completed Three Sets of NIC/2/3 7053 (NICMOS Limb Avoidance =
Determination)

       The Near Infrared Cameras (Camera Two and Three) were used to make =
limb avoidance determination observations.  The purpose of this test is =
to determine the appropriate bright and dark Earth limb avoidance angles =
for NICMOS science observations.  Angles for both routine and =
low-background observations were be determined.  The observations were =
executed as schedule, and no anomalies were noted. 

   1.4 Completed STIS/CCD 7142 (STIS CCD Flat Fielding)

       The Space Telescope Imaging Spectrograph (CCD) was used to make =
field-flatting calibration observations.  These CCD Delta-flats are =
intended to monitor CCD stability over monthly time scales.  The =
observations were completed as planned, and no problems were reported. 

   1.5 Completed WF/PC-2 6363 (The Environments and Host Galaxies of =
BL-Lac Objects)

       The WF/PC-2 was used to make snapshot survey observations of =
BL-Lac object 1ES1255+24 in order to study its environment and its host =
galaxies.  The goal is to investigate systematic trends in host galaxy =
type, unusual morphological features, nearby companion galaxies, etc.  =
The observations were executed as scheduled, and no anomalies were noted.

   1.6 Completed Three Sets of STIS/CCD 7092 (CCD Dark Rate and Read =
Noise)

       Observations were taken to measure CCD dark current and to gather =
data for making super darks.  The observations were completed as planned, =
and no anomalies were reported. 

   1.7 Completed STIS/CCD 7124 (Kinematics of the Nuclear Gas Disk in the =
Galaxy  M84)

       The Space Telescope Imaging Spectrograph (CCD) was used to make =
observations of the galaxy M-83 (NGC-4374) in order to study the =
kinematics of its nuclear disk.  This is to detect a super massive black =
hole in its active galactic nuclei.  A wavelength calibration observation =
was also taken.  The observations were completed as planned, and no =
anomalies were reported. 

   1.8 Completed WF/PC-2 6904 (WF/PC-2 Cycle 6 Cal.:Darks)

       The WF/PC-2 was used to make a series of several dark calibration =
images as part of a standard calibration within Cycle 6.  This =
calibration procedure is performed once per week as part of an on-going =
CCD calibration to be used to monitor and characterize hot pixels.  The =
observations were executed as scheduled, and no anomalies were noted.

   1.9 Completed STIS/CCD 7071 (CCD Target Centering)

       The Space Telescope Imaging Spectrograph (CCD) was used to make =
observations of star GD153 in order to make calibration measurements to =
center the image in the CCD.  The purpose of this proposal is to =
demonstrate the ability of the STIS FSW to center (peakup on) an isolated =
point source within a spectroscopic slit using the CCD detector.  The =
observations were completed as scheduled, and no problems were reported. 

   1.10 Completed WF/PC-2 6346 (Snapshot Survey of the Ultraluminous IRAS =
Galaxy Sample-Part 1 High)

    The WF/PC-2 was used to make snapshot survey observations of the =
ultraluminous IRAS galaxy QDOTULIR12.  These data will be searched for =
multiple cores, which imply a merger has occurred, and for starburst =
regions.  The observations were executed as scheduled, and no anomalies =
were noted.

   1.11 Completed Two Sets of WF/PC-2 6359 (Core Properties of the Bulges =
of Spiral Galaxies)

       The WF/PC-2 was used to observe spiral galaxy ESO508G34 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.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 05
                                        Successful : 05

                          Scheduled Reacquisitions : 04
                                        Successful : 04

   2.2 FHST Updates: 

                              Scheduled : 28
                             Successful : 28

   2.3 Operations Notes: 

       No significant operational problems were encountered during the =
last 24 hours. 

3.0 SIGNIFICANT FORTHCOMING EVENTS: 

       Continuation of normal science and SMOV operations.

/DMH