HUBBLE SPACE TELESCOPE

                              DAILY REPORT #1366

PERIOD COVERED:  0000Z (UTC) 04/10/95 - 0000Z (UTC) 04/11/95

Daily Status Report as of 101/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Three Sets of WF/PC-2 5655 (WF/PC-2 Cycle 4 Calibration:
Internal Monitor. 2: Flats Part 2)

        The WF/PC-2 was used to make both dark and visual flats. The
observations were completed as planned, and no problems were reported. 

   1.2 Completed FGS 5686 (Ultra High Resolution Studies of AGNs with the
FGS: Cycle 4 Carryover)

       The FGS#3 was used in the TRANS mode to make astrometric observations
of AGN 3C279 which is known to have a milliarcsec structure in their nuclei
at radio wavelengths. If any structure is found, more observations will be
made to look for signs of superluminal motion. The observations were
completed as planned, and no problems were reported.

   1.3 Completed WF/PC-2 5370 (HST Medium-Deep Survey: Cycle 4 Medium, High
Galactic Latitude)

       The WF/PC-2 was used in parallel with the prime science observations
to make high galactic latitude observations as part of a medium-deep sky
survey. The observations were completed as planned, and no problems were
reported. 

   1.4 Completed Two Sets of WF/PC-2 5562 (WF/PC-2 Cycle 4 Calibration:
Internal Monitor 3: Darks)

       The WF/PC-2 was used to obtain several 30-minute long, dark exposures
to provide ongoing calibration of the CCD dark current and to monitor and
characterize the evolution of hot pixels. The observations were executed as
scheduled, and no anomalies were noted. 

   1.5 Completed FGS 5333 (Linking the HIPPARCOS to the Extragalactic
Reference frame: BR12-23, Part 2)

       The FGSs were used to make astrometric observations of several stars
(i.e., 1302-102IN, 360-REF, 361-REF, 362-REF and INCA221-89) whose apparent
position lies near extragalactic objects. All of these objects have been
observed by the HIPPARCOS satellite. The intent is to tie the HIPPARCOS
reference frame to the extragalactic reference frame. The observations were
executed as scheduled, and no anomalies were noted. 

   1.6 Completed FGS 6147 (Extragalactic Astronomy and Astrophysics Final:
Cycle 4 Observations)

       The FGSs were used to make observations of targets 1302-102IN,
340-REF, 341-REF, 342-REF and INCA221-88. The objective of this long-term
program is to determine the rotation of the HIPPARCOS reference relative to
the extragalactic frame. The observations were executed as scheduled, and no
anomalies were noted.

   1.7 Completed WF/PC-2 5091 (GTO High Latitude Parallel Program: Cycle 4)

       The WF/PC-2 was used in parallel with the prime science observations
to make high galactic latitude observations greater than +/-30 degrees. The
observations were executed as scheduled, and no problems were reported.

   1.8 Completed WF/PC-2 5663 (WF/PC-2 Cycle 4: Photometric Calibration
Monitor: Fields Part 2)

       The WF/PC-2 was used to make observations of globular cluster NGC-5139
with various filters in order to check the photometric calibration of the
WF/PC-2. The observations were completed as planned, and no anomalies were
reported. 

   1.9 Completed WF/PC-2 5397 (Determination of the Extragalactic Distance
Scale: Cycle 4 High)

       The WF/PC-2 was used to make images of galaxy NGC-4414 to be used in
measuring the periods of Cepheid variable stars within this galaxy. The
observations were completed as planned, and no anomalies were noted.

   1.10 Completed FOS/RD 5535 (Cycle 4 Internal Wavelength Calibration)

       The Faint Object Spectrograph (Red Side) was used to make internal
calibration observations to monitor the stability of the wavelength scale for
different gratings. The observations were completed as planned, and no
problems were reported.

   1.11 Completed WF/PC-2 5479 (Subarcsecond Structure in Nearby AGNs)

       The WF/PC-2 was used to make snapshot observations of the nearby
active galactic nuclei of F312 to study the interactions between the central 
engine, the stars, and the interstellar matter in the AGN. The observations
were executed as scheduled, and no anomalies were noted. 

   1.12 Completed FOS/RD/S/C 5528 (FOS Cycle 4: Focus, X-Patch, Y-Patch)

       The Faint Object Spectrograph (Red Side) was used to make both Dark
and Wave calibration observations. No external sources were used. The
observations were completed as planned, and no anomalies were reported. 

   1.13 Completed GHRS/2 5466 (The Interaction Between Io and The Plasma
Torus)

        The High Resolution Spectrograph (Side Two) was used to make Echelle
spectrographic observations of the plasma torus which is a result of the
interaction of the planet Jupiter and its moon Io. Of particular interest is
the O II emission line at 2471 A0. The observations were completed and
scheduled, and no anomalies were reported.

   1.14 Completed FOS/BL 6146 (FOS Location of Spectra and Aperture - Part 2)

     The Faint Object Spectrograph (Blue Side) was used to conduct a test to
determine the repeatability of positioning the filter-grating wheel. All
observations were internal. A wave length calibration image was also taken.
All 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 : 7
                                        Successful : 7

   2.2 FHST Updates: 

                              Scheduled : 13
                             Successful : 13

   2.3 Significant HSTARs: None

   2.4 Operations Notes: 

       No problems were reported.

3.0 ANOMALY STATUS:

   3.1 Significant New Anomalies: None

   3.2 Significant Unresolved Anomalies: None

4.0 SIGNIFICANT FORTHCOMING EVENTS: 

        Nothing at this time.

/DMH
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